what an episode! (even though no new surprises) Can't wait for the next episode! Thanks for the recap!

OMOOMOOMOOMOBREATHE!!!
So many thoughts after this episode and I don't know where to start.
Ok, first things first.
This is for Jae-Yi: Ok, so you have this amazing plan to catch the killer. You offer yourself as bait. Brilliant. Clever. Genius. You deserve a round of applause. BUT. (There is always a but).
How stupid can you be that you not only offer yourself up as bait, but you also have NO (insert word of choice: zilch, nil, nada) back-up whatsoever! What's wrong with you woman??
Jae-Yi was SO SO OH SO lucky that her dad happened to be in the area! Otherwise, she would've been dead! I was yelling at her to run run runnnnn when the killer was chasing her! My heart was in my throat and I was barely breathing! How could this clever lady do this to me!?
But the ending!! Yay Kwang-Ho. I'm so glad he came on time to hear the whistle and save his daughter! And top of that he made the connection that we've all been waiting for him to make. That Jae-Yi is Yeon Ho! YAY!!

I don't know if it's just me, but I actually thought that Jae-Yi was planning on finding out the second killer (Dr Mok) and therefore had laid a 'trap' for him. So it came as a surprise to me when it turned out to be Ho-Young who was chasing her! I probably didn't pay attention (what with all the nail biting and internal screaming) because I thought that the detectives were going after Ho-Young while Jae-Yi went after Dr Mok. I guess I was also a teeny bit scared that Dr Mok was beginning to see Jae-Yi as a threat because she had accepted there being a second killer and may even come close to finding out who that is. So I assumed that he went after her to silence her. So I was confused when he called the detectives to let them know where Jae-Yi was and what she had planned. LOL did that even make sense!?

But overall, what a great episode! Can't wait to see how Jae-Yi is going to react when she finds out she not only has a dad but that he happens to be just a few years older than her (look-wise of course, hehehe).

I was shouting nonsense and screaming incoherently during that last 10 minutes.

The Shin Jae-yi we know now is clearly diferent than the Jae-yi we were introduced to in the beginning. That Jae-yi might not bat an eyelash when Kwang-ho said those bluntly honest, hurtful things to her. But her relationship with both Sun-jae and Kwang-ho has awakened the dormant empathy inside her. So that while she didn't necessarily looked hurt, that comment might hurt and shake her up badly. The thing is, she still struggled to show her care and concern in a normal way. I think her deciding to be a bait without even consulting the police was her extreme way to take a sole responsibility of her words to Jung Ho-young.

Now that we know Jae-yi is alright, I can appreciate the beautiful touch of that whistle. For little Jae-yi, blowing that whistle meant her mom would come to ease her hurt and comfort her. But after she died, it only become a memento from a happier childhood days that she may not remember anymore. And now, when she wore it as a good luck talisman, her father came and rescued her, finally putting the original meaning back to that whistle.

I'm not crying :( *sobbing *

I'm a crying mess... As to why he wants to investigate maybe because:
1.he wants to play a game of mouse and the cat
2.he maybe narcissist,so he wants attention

And donkey of the day goes to JY. Like girl I feel you nd understand you but what you dd was reckless. In that final scene I saw kwang ho die a second time. Can't the poor guy catch a break.

Thanks for the recap! I'm loving the show so far. Although most of the big reveals were not new to the viewers, it was handled in a way that piqued my interest. Like TeriYaki mentioned, I'm most looking forward to learning Dr. Mok's justification for all the murders and what triggered him to start again? What I loved the most in this episode was Sun jae admitting that he'd be sad to lose his partner to the past <3 My only gripe with this show is how the back-up seems to disappear when our heroes need them the most! When they were searching for Jung Ho in his hideout and here out on the field. And also Jae Yi's noble idiocy(?) this episode. Other than that I'm thoroughly enjoying all character arcs.
P.S is 2016 Kwang-ho still a missing person/ dead body at Dr. Moks?! Isn't not reporting a dead body a crime?

I think Dr. Mok is desperate not to be equated to Jung Ho-young. He feels that he is a "higher version" as he kills with a reason, whereas Ho-young just a mere rash killer.
Am sure his so called reason is going to be something twisted. I also think that it may have got something to do with his habit of confessing. What if he heard/ tapped the confessions of these women and decided they were sinners and deserved to be killed? They may not have confessed to serious sins but in the eyes of a psycho killer, you never know. May be that is why he thinks his victims were not good women.
Or judging from his remark on the latest victim, it may be as sick as him sticking to a time curfew and killing women wandering around in skirts after the curfew! But SunJae's complete trust in this guy gives me the creeps. Kwang Ho and Sun Jae, plese get an inkling soon!

This show is just going to give me a heart attack everytime!

I also think Dr Mok wants credit. He felt offended when they said he killed for no reason. (Though I don't know his reason for killing). He thinks his copycat, Jung Ho is trash: no originality. He took it as an insult to his, uh, "craft"/"legacy" and not as an homage. Creepy.

Can't wait till the next ep!

Thanks for this recap! Tense or what? Does Dr Mok have a secret store of 20 year old ink bottles.

Yay~ ep 10 recap
Thanks @teriyaki

This episode is so intense especially the last 10 mins... I was screaming when Jaeyi running away from JHY. Thank god for that whistle. For a brief moment, I do wonder what happen to KH if JY die tbh. And for both of them find out that Jaeyi is Yeonho during that intense moments? Gah... I cant breath..
I'm curious about few thing regarding Dr Mok though:
1- Why is he reacted as if someone challenging him when he saw the victim #5 leg tho? At that time nobody makes any connection to his murder spree in 1986 tbh. So for him to retaliated and killed victim #7 because of that, I still dont get it. But at least we kinda know his thinking in choosing those victims, women in skirt, walking at night = bad women.
2- During his discussion with JY, I initially thought that Dr purposely lead JY into making herself as a bait but his reaction watching her interview & his action afterwards seems like he didnt. But I'm not sure I'm reading that scene properly tho.

As for your questions, I think he is offended that the police doesnt seems to think that someone other than JHY i.e him capable of doing that. My theory is he just egging them cause he thinks he is smarter than the police (true!) and wont get caught.

I looks forward to see how Kwangho deals knowing that JY is his daughter and Sungjae too. Will he suddenly becomes extra respectful? hahaha

I knew that Jae-yi wasn't going to die but it still scared me to see her gasping for air like that, I wish she had planned this with our team, Sun-jae would've never let her become the bait but at least he would've known what was going through her mind, she could've died there if it wasn't for dr. Mok's phone call to Sun-jae.

And at that, why did he do it? I mean dr. Mok? Why did he tell them about Jae-yi, I'm glad he did but I just don't understand him! Is it because Jae-yi is the only one who's convinced that there are two killers? But doesn't he feel threatened by that, if she could discover there are two killers, she could also disover that one is him? Is it because she doesn't fall under his "criteria" for killing people?

I'm so excited for next episode, I can't wait to see how Kwang-ho's going to react to the fact that Jae-yi is his daughter!!

Thanks TeriYaki for the recap.

I've been thinking... What if they pulled a 'Signal' for 'Tunnel' for its ending. What if Kwang Ho will ended up being in a coma somewhere unknown and whatever even that lead to the events of 2017 still happened? Like the murder case in 1986 still unsolved and Kwang Ho's wife still killed in the car crash and Jae-Yi still being adopted.

For someone who's supposed to be smart, she sure was stupid. Playing bait and luring a known serial killer to a remote place is one thing. But having absolutely no escape plan whatsoever is the height of stupidity. I was hoping that she has a stun gun, a knife or anything that can help her defend herself. Seriously, a whistle???? When she didn't even tell anyone about her plan? I mean, c'mon she studied killers as a profession! What was going through her head?? Here, I'll play bait and hope that he won't kill me. This episode was such a letdown. Did the writers really expect the audience to just swallow that? And here I thought that it's refreshing to have a woman playing a brilliant but cold character. But nooo, she's a woman so she needs to be saved by the heroes.
( ノД`)…

Now with the cards are all out in the open I wonder how things will go from now on, what is left that they don't know that the real killer was infront of them all along, also the mystery of how he managed to travel with KH or was he originally living in the 86?, i hope it will keep up with this tone for the last 6 episodes, it was an amazing ride till now.

The only thing that wasn't pleasant is how JY went as a bait without notifying the police or anyone about her plan, how would they catch the killer if he killed her and disappeared! What was her plan exactly getting killed and that's it! That was a ridiculous move. Two killers competing was of a help to spare her life.

OMGOMGOMG!! Choi Jin Hyuk just about slayed me with his emotions in the last 10 minutes!! The tension kept increasing till he found out that Jae-Yi is Yeon-Ho. That little catch in his voice which was laced with relief that she is alive and shock and disbelief that she is Yeon-Ho!! This episode really ramped up the edge-of-the-seat feels!!

Well.... No words... It's an awesome episode as expected from The Tunnel team....
When KwangHo returns to the past(let's assume he does) the future may be very much different.... He goes back, catches the killer in the past(again an assumption), now SunJae need not become an officer to catch his mother's killer, Yeon Soon may not have died, Jae Yi may not be adopted. kwangHo, Yeon Sook and Yeon Ho would be one happy family, then SunJae would not meet Jae Yi, the future then would be vary much different than what it is now.... I am wondering whether kwangHo needs to go back.... I am hoping he won't, coz that would turn tables very differently.....
Now coming to the present and young Kwang Ho, why his story is on hold what happened to him and how did he know about the murders when there are no records.,...
I hope the writer give a clean and neat finish for this beautifully built story ?

The look in his eyes: that cold-hearted robot @%&# lady is MY daughter???... I have to go back to 1986 and give her an infancy!!!.

I do have to disagree with your analysis of the victims. Dr. Mok killed that young girl because she walked alone at night and because he could kill her. Anything else that he says about her is justification for her death. To say that the victims are complicit in their deaths is victim blaming.

Can we please talk about the part with the whistle. As touching as that moment was, there is noooo way he could've known it was the same whistle from 30 years just by looking at it. Anyone can have a whistle. This was just poor on the writers part. If anything Yeon Sook could have had his initials engraved it??

And whatever happened to 2017 Park Kwang Ho?? They stopped looking into his background and how he knew about what happened 30 years ago. I'm sure he was smart enough to keep notes and documents somewhere safe if he ended up dead *rip Kwang Ho*

Did Jung Ho Young witness the first murder 30 years ago? And that's why he wanted to know "what if felt like to kill a human", as well as why he killed dogs. The murder could've sparked his curiosity.

Does anybody know the reason why Dr. Mok stops killing for 30 years (at least before the 7th and 8th victim)? And who was he talking about when he said that "i'm only responding to your game"? JHY? But JHY had nothing to do with Kim Young Ja's (5 dot victim) death..

'Run Daddy! Run!!'
That's what I was screaming for whole final 10 minutes! ~phew~ And finally..finally He Knows! What an episode!
You know it's remarkable how while we all know the obvious..Tunnel still manages to rush our adrenaline high! Bravo for that!!~slow claps~
Ah..also I wonder now that Sunjae knows too..will he go Jondae on Kwangho? You know..a man shows up from past who is 60+ but looks 30? Banmal could be Ok! But if that said man is the father of the girl you like?? Hmm...now that's a different story! Hehe..
Can't wait for the next episode!

Thanks TeriYaki!

Suffice it to say that that ending was so stressful-suspenseful that I had to fast forward it.

Like the commenters here, I'm flabbergasted that a smart girl like Jae Yi could choose to do something so foolish. My only consideration for her is that perhaps she felt guilt after Kwang Ho's reprimand and took it upon herself to make amends... but still, in what universe of good sense did she expect to do to save herself and prevent future killings, when faced with a successful killer while she's entirely alone, without backup and without weapons?

This just felt so preposterous it took me out of the show in a fit of peeve. ? ? ? ? ? ? ? ? ? ?

@ TeriYaki, thank you for the recap! While the show is lopsided on balancing its reveals and hints to those reveals, this show is still the one I wait for every week with much impatience. In a way, I'm *sort of* glad that it doesn't do hints and reveals well, because I don't know if I'd handle the intensity at all otherwise! The four main characters and the actors/actresses playing them are fantastic!

with Dr. Mok I do believe that he is killing again because he doesn't want his work to be credited to someone else or maybe it's just cos he is angry.... although I don't know why he is trying to let the cops know that there are two killers....does that even make sense guys??? cos now is the time he can get away with it,does he wanna get caught please tell me

OMG, the end gave me chills, well done Tunnel, well done. That is how you end an episode.

Well Daddy’s mystery little girl is a mystery no longer and just like her Daddy, she wore a whistle on her neck lol

I think Dr. Mok just can't let his murders be thought to be without a reason. There is clearly a very clear psychosis to his actions, and he thinks his actions justified. However, it is unclear whether anyone else BUT the doctor will find what those women did (whatever it may be) to be a sin. It makes me really excited to find out what that is. Clearly, it's more than simply wearing skirts.
Things got really exciting, although I have NO idea what Jae Yi's plan was.... get him to attack you... and then what? No one knows where you are and you don't appear to have a weapon...

This episode was so intense! But I realized something. Jae-yi is JUST like her dad man...

I think it's so interesting how this show's mysteries have solutions that are generally quite obvious to the audience (Sun-jae and Jae-yi's identities, Dr. Mok possibly being the killer) but we still get a stunning emotion shock that makes up for it. Yeah, we all knew Sun-jae was going to be that baby but that didn't take away from the emotions of that reveal. It's nice that we still get a rewarding emotional experience despite the lack of mystery.

About jy no back up feel weird tough, the next episode she must explain why'd she do that......but seeing kh panic jaeyi might be dead and then more panic that she is yonho....oh my. Poor guy

I love this show and look forward to it every week but I need to say something about forensic and police procedure errors.

In episode 10: touching the victim with bare hands - check. Touching the victim's possessions with bare hands - check. Why oh why are we seeing this in a show written in 2017? This is CSI 101 stuff! How could the writers not KNOW this. Argh!

Jae-Yi using herself as bait with NO backup. That makes no sense based on what we have seen of her character, education and profession.

I was slow clapping this show all throughout the last 10 minutes. They were just beautiful. Kwang-Ho & Jae-Yi had me on the edge of my seat the whole time.

Glad Jae-Yi is okay but seriously, her plan wasn't thought through at all. Did she think she could just walk up to him and discuss his murders or something?

I love this show & its the only drama i am watching at the moment. Can't wait for it to air every week. I will miss it when it's done.

Thanks for the recap!

I'm wondering how it will be when and if Kwang Ho goes back to his time. He's so focused on returning to Yeon Sook he's not thinking about those who will be left in the future... but here's where I'm kind of curious as to how that will work if he returns to the past will the future change change or will it be like a parallel world where they remember Kwang Ho and everything that happened.

Also I'm guessing that our killer from the past didn't time travel with Kwang Ho since Dr. Mok is old looking unless he was already older when he walked through the tunnel to the future.

I'm also curious as to how Kwang Ho and Sun Jae will react to Jae Yi being Yeon Ho, will they bring her into the time traveling loop or will they keep it a secret? I do believe this is the longest comment I've ever written!?

The level of Makjang in this episode surprises me, maybe because I expected more from this writer whose many twists and turns of the plot kept me, a jaded viewer, at the edge of my seat and blew me away.

Now coincidences replace old fashioned detective grunt work? Smh. Jae yi just happens to set herself up as bait for a serial killer without informing the police or having any backup plan (such as mace or a gun for instance?). For such a smart professor that was incredibly and inexcusably stupid. Someone needs to remind her that when you set bait to catch fish, you also need a fishing line to reel in the fish. So who was supposed to rescue her when the serial killer was choking the life out of her, when she didn't bother informing the police or anyone of her plans? It's fortunate for her that the coroner informed the police on her behalf. (Crises of conscience?)

And then her father, Kwang ho, just happens to recognize a whistle which was abandoned thirty years ago on her neck? Which begs the question why it would still be in such good condition and easily recognizable after so many years. There were no initials on the whistle and it looked pretty generic to me, the viewer.

I just wish the big reveal could have happened more realistically and more organically. I still love the drama, but I'm exasperated at the recent turn of events. Even the reveal of the second serial killer was done in such a clumsy way. Show vs. tell, anyone?

Honestly I was put off by JY's stupidity, KH and SJ's unprofessional ways of handling crime scene matters, and the police's inability to make up a decent plan to trap a criminal. But I'm still watching this til the end because it's one of the two watchable series this season.

This show started really strong but just like every drama, the quality is going down as the number of episodes increase. Sigh. I hope the writer won't be so lazy with his/her plots. Some seem forced, at first I was willing to let it go (like Sun Jae's random confession in the rainy day episode) but some I just can't. Yeah, just because a woman is wearing a whistle chain around her neck means she's KH's daughter. Jeeeeeez. I hope she won't deny being Yeon Ho or I will slap her 100x. I don't need more bs.

Regardless of how intellectual and learned Jae Yi is, she is obviously someone who is hardly in touch with her feelings. Probably after her mother's death, she had stopped keeping tab on her heart. That's why she couldn't speak when her foster parents died in the fire, and didn't react much when Kwang Ho found a fire in her kitchen. Also the time when she held the blade of the knife, she didn't even flinch in pain.

Poor girl.

I agree with some of you who mentioned that she is slowly showing more human emotions as she has more interactions with Sun Jae and Kwang Ho.

But Kwang Ho's words really did shock her and lead her to think of what she had yet thought of: the victims, future potential victims, and the surviving families and friends of the victims.

I think she really felt like she has the duty to prevent the death of the next civilian victim (though she is also a civilian) by setting herself up as the bait. She is most likely able to lure Jung Ho Young out because he was already acquainted with and interested in her.

In terms of not getting any back up or bringing any self-defense tools, most likely she didn't see herself as a flesh-and-blood being that might die too,or that she didn't even feel concerned about herself. As a lady who is always prim and proper, clean and tidy in her dressing, she even allowed her student to throw nail polish at her WHITE blouse, without feeling aghast or yucks! or a woeful lament of "how I am going to clean this!"

In a way, she is like a r.o.b.o.t. , only able to understand feelings in paper and psychological terms, not what SHE has or can experienced.

It is only when she came to and realized that personal death is looming right in front of her in the shape of JHY that she finally get in touch with her survival instinct and TERROR spelt in capital letters. Her terrified expression is the MOST expressive and human display of emotion she has shown in the past 10 episodes.

This must be a moment of rude shock when she finally realized with a big shock that "I fear death", "I can feel emotions", "I can feel terror", "I can tell that I REALLY want to live".

And the surprise of someone searching for Yeon Ho, and the shock of surviving a terrifying near-death experience only to wake up to someone calling her Yeon Ho, will only help make her become ...... a real girl.

I am so in love with this drama. Like what Beanies said, although things happened in drama can be seen miles away, its the emotional punch that makes it so satisfying despite the revelation.

However, there are few points that makes me wondering
1. Let say Dr Mok is a time traveler, why his time travelling is different than Kwang Ho (if he is a time traveler)? In earlier episodes, it was shown that Dr Mok is our resident expert in autopsies and Sung Jae seems to know Dr Mok since a long time ago, so it kinda weird and confusing to have different types of time travelling for Kwang Ho and Dr Mok, if that is true.

2. If Dr Mok is not a time traveler, why did he stop killing for 30 years? Did his killing desire turn dormant after he knocked off Kwang Ho in the tunnel?

All these questions, I really hope it will be answered by the writer. I sorta dont trust the writer, and I really hope for a satisfying answers and ending. For this drama, only time will tell.

Again, no surprises for us as viewers, but I still got chills at the reveal.
I'm another who thinks it was incredibly dumb for JY to go alone with no back up and no back up plan. That seems out of character for someone supposedly so smart.
Overall, though, incredible episode. I'm getting anxious to know whether or not KH will be able to go back to 1986 or not and catch the killer sooner, preventing these future events . I'm also still curious as to where young KH fit into the storyline. Like why was he searching for the killer and how did he know about the old case? Who is he to them? I'd also like to get to see Ho Young's sister and see what led him down this killer path.

Like many said before, no new surprises. However, when Jae Yi acted as bait for the killer, I was screaming at my screen. Obviously, she is a clever one but trying to complete this task by herself with no help against a well known serial killer, was not okay. But... Kwang Ho did find her and I love the moment when the show actually uses the whistle for its original purpose and when he finally realizes that she is his daughter. One question though, what is the full criteria for the murders? I understand that they are women who don't have a very good "resume" but it there a more specific target.

Wow. Just wow again when another secret is out in the open again though viewers knew it way before our lead characters do. Kwang Ho, again delivered his emotional scenes so well.....???

Many ppl has stated how stupid JY was, in being a bait without any backup or not even informing the police about her plan. I guessed that from her 'trauma' from her childhood, she has been living like a cold robot and maybe she thought that she will sacrifice herself to be a bait but when the killer approached her, her innate fright still comes out and graps her even if she thought she has nothing to lose already.

Just watched this episode and I'm so angry at the Jae-yi/killer scene.
Did she have a plan? Was she just going to lure a man who has killed others and not have an escape plan? What was the use of the whistle of she ddnt inform the police of her plan? I mean!!!!!
I expected more from her so I'm really mad at the writer of that scene. I had so much hope for the 'bait-capture' plan and I'm served limp noodles. ?????

Is there a stupider act than luring a serial killer by providing self as bait WITHOUT telling anybody, lest the police ??? What ? You're gonna talk himself out of murdering you ? Reason with him ? Look him in the eyes and ask why he's obsessed with skirts ?