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Title: 당신이 잠든 사이에 / While You Were Sleeping
Chinese Title: 當你沉睡時
Genre: Fantasy, Legal, Romance
Episodes: 32 (35 minutes/episode)
Broadcast network: SBS
Broadcast period: 2017-Sep-27 to 2017-Nov-16
Air time: Wednesday & Thursday 22:00 (2 episodes back-to-back)


This is a pre-produced drama. Filming began on 2017-Feb and finished 2017-July.

The drama is about a woman, Name Hong Joo (Bae Suzy), who can see unfortunate events in her dreams, and a prosecutor, Jung Jae chan (Lee Jong Suk) who does everything he can to prevent the woman’s dreams from coming true.


Main Cast

Lee Jong Suk as Jung Jae Chan
Nam Da Reum as Jung Jae Chan (young)
Bae Suzy as Nam Hong Joo
Lee Sang Yeob as Lee Yoo Bum
Yeo Hoe Hyun as Lee Yoo Bum (young)
Jung Hae In as Han Woo Tak
Go Sung Hee as Shin Hee Min

Division 3 Detectives

Min Sung Wook as Lee Ji Kwang
Bae Hye Sun as Son Woo Joo
Lee Ki Young as Park Dae Young
Kim Won Hae as Choi Dam Dong
Lee Jae Kyoon as Choi Dam Dong (young)
Park Jin Joo as Moon Hyang Mi
Son San as Min Jung Ha

People around Jung Jae Chan

Shin Jae Ha as Jung Seung Won (Jae Chan’s younger brother)
Lee Jung Eun as Jae Chan’s mother

People around Nam Hong Joo

Hwang Young Hee as Yoon Moon Sun (Hong Joo’s mother)


Lee Yoo Joon as Oh Kyung Han (Police officer alongside with Han Woo Tak)
Kim Da Ye as Kang Cho Hee (Coffeehouse employee)
Oh Ui Shik as Bong Du Hyun (SBC reporter)
Pyo Ye Jin as Cha Yeo Jung (Police officer who unrequited loves Han Woo Tak)
Heo Joon Suk as Dong Gyun
Hong Kyung as runaway soldier
Moon Yong Suk as Lee Hwan


Kim So Hyun as Park So Yoon (Ep. 3-8)
Jang So Yeon as Do Geum Sook (So Yoon’s mother) (Ep. 3-8)
Uhm Hyo Sup as Park Jun Mo (So Yoon’s father) (Ep. 3-8)
Choi Won Young as Nam Chul Doo (Hong Joo’s father) (Ep. 3-4)
Jang Hyun Sung as Jung Il Seung (Jae chan’s father) (Ep. 1, 5-8)
Kang Ki Young as Kang Dae Hee (Ep. 9-)
Kang Shin Hyo as student (Ep. 10)
Shin Eun Jung as Kim Joo Young (judge) (Ep. 11-12)
Kim Min Jae
Yoon Kyun Sang
Lee Sung Kyung

Production Credits

Directors: Oh Choong Hwan, Park Soo Jin
Screenwriter: Park Hye Ryun

Episode Ratings

    Nationwide Seoul Nationwide Seoul
2017-09-27 1 8.2 (16th) 9.1 (9th) 7.2 (19th) 8.1 (12th)
2017-09-27 2 9.4 (14th) 10.8 (8th) 9.2 (10th) 10.4 (6th)
2017-09-28 3 8.0 (17th) 8.7 (11th) 8.3 (16th) 9.8 (10th)
2017-09-28 4 9.3 (10th) 10.2 (9th) 9.2 (12th) 10.9 (8th)
2017-10-04 5 5.0 5.2 (18th) 5.1 5.6 (17th)
2017-10-04 6 5.5 (19th) 5.7 (14th) 6.1 (11th) 7.0 (7th)
2017-10-05 7 8.3 (13th) 8.2 (11th) 7.9 (14th) 8.2 (10th)
2017-10-05 8 9.6 (7th) 9.9 (3rd) 8.9 (9th) 9.6 (6th)
2017-10-11 9 7.8 (17th) 9.3 (10th) 8.1 (13th) 10.0 (7th)
2017-10-11 10 8.9 (15th) 10.2 (8th) 9.4 (8th) 11.5 (5th)
2017-10-12 11 7.5 (18th) 7.8 (13th) 8.9 (12th) 10.3 (8th)
2017-10-12 12 8.5 (12th) 8.9 (8th) 9.7 (10th) 11.8 (6th)
2017-10-18 13 7.6 (18th) 9.5 (9th) 8.6 (8th) 9.5 (6th)
2017-10-18 14 9.1 (10th) 11.4 (6th) 10.0 (5th) 11.3 (4th)
2017-10-19 15 7.1 7.7 (18th) 7.9 (16th) 8.9 (10th)
2017-10-19 16 8.0 (18th) 8.9 (11th) 8.9 (11th) 9.9 (8th)
2017-10-25 17 7.7 (15th) 8.1 (12th) 7.3 (16th) 7.9 (10th)
2017-10-25 18 8.8 (12th) 9.7 (8th) 8.9 (7th) 10.0 (4th)
2017-10-26 19 6.5 7.0 (15th) 8.2 (12th) 9.6 (8th)
2017-10-26 20 7.4 (18th) 8.7 (8th) 8.9 (8th) 10.3 (6th)
2017-11-01 21 6.5 (16th) 7.6 (11th) 6.9 (13th) 7.9 (9th)
2017-11-01 22 7.6 (11th) 8.9 (6th) 8.4 (7th) 9.7 (5th)
2017-11-02 23 7.0 (18th) 7.1 (16th) 7.3 (17th) 8.3 (13th)
2017-11-02 24 8.2 (14th) 9.0 (7th) 8.6 (9th) 9.9 (7th)
2017-11-08 25 5.7 7.2 (18th) 6.8 (17th) 8.2 (9th)
2017-11-08 26 6.8 (19th) 8.4 (11th) 8.6 (7th) 10.0 (6th)
2017-11-09 27 7.7 (18th) 9.3 (9th) 7.7 (12th) 8.9 (9th)
2017-11-09 28 8.7 (14th) 10.1 (7th) 9.6 (8th) 11.3 (5th)
2017-11-15 29 7.2 (16th) 8.1 (9th) 8.1 (8th) 9.3 (6th)
2017-11-15 30 8.7 (10th) 10.0 (6th) 9.6 (7th) 11.0 (5th)
2017-11-16 31 7.6 (16th) 8.6 (10th) 8.7 (11th) 10.0 (7th)
2017-11-16 32 8.7 (13th) 9.5 (6th) 9.7 (7th) 10.9 (5th)

Sources: TNmS Media Korea & AGB Nielsen Korea

*** Different between TNmS Media Korea & AGB Nielson – Here


Related Photo

(Other Photo from Official Site)

Official Site

Official Trailer
Trailer I
Trailer II
Trailer III

Watch Online in Viki.com

97 Responses to “While You Were Sleeping (2017)”

Pages: « 1 [2] Show All

  1. 51
    sinopsis while you were sleeping Says:

    im really excited..

  2. 52
    WYWS Says:

    For the past drama of Suzy I can say that she’s doing really good in this drama. I really admire all her hardships despite of all the criticism of the salty haters of her she keeps on going! Fighting our Bae :*

  3. 53
    Red Says:

    I wonder if woo tak is related to Jung Jae Chan and Nam hong joo when they were young.

  4. 54
    ALLiiee Says:

    Super excited for the next episode especially the kiss scene omg!!!!

  5. 55
    BTS Says:

    If you want to see the Behind the scenes of this drama go look for sbs catch on youtube 🙂

  6. 56
    Guille Says:

    Hi, I am Mexican and I love the korean dramas. You are the best in romantic dramas and fantasy. Thanks for your job.

  7. 57
    Anna Says:

    I really like Han woo tak

  8. 58
    Dina5765 Says:

    Actually i really like this drama..but i dont know, not like any LJS’s drama, until now i can’t feel any chemistry between suzy and LJS, sorry if i’m mistaken. But we’ll see until then. Fighting!

  9. 59
    Era Says:

    wonder why suzy is still bad in acting. I love this drama, but suzy. she ruins the drama with her bad acting. beautiful isnt enough. look at the rating. lee jong suk is ma wish

  10. 60
    JustAPasserby Says:

    Geez, some ppls here always love to shade on Suzy.. some of u blame Suzy for the low ratings? pls take a look with who WYWS being rivals..
    Hospital ship always come 1st with 2 digits now having a neck to neck ratings battle..
    we got the lowest rating as well as other dramas, it’s bc of Chuseok and baseball season..
    if u only grading the drama with the ratings only then almost all dramas are flop too then.. since all drama kinda having low ratings as well.. even TOL has struggles now against WC..

  11. 61
    random Says:

    if the ratings bad it’s all Suzy fault, when the rating up suddenly it’s somebody work..
    hmm.. so far the knets even on Nate are praising WYWS and Suzy acting..
    if u just see a drama bc of the rating it will be ur lose..
    this is the lowest Suzy dramas rating so far as well, but it’s not due on Suzy acting LOL, there are various reasons for that.. and guess what despite that it still hold the 1st place in it’s time slot, even has the most buzz worthy dramas in 3 consecutive weeks,
    if u just judge someone acting just based on the drama ratings, I highly doubt it..

  12. 62
    Neni Says:

    I love bae suzy.. As a singer, performer, dancer. She’s so beautiful, i love her group as well, their songs. But.. As an actress, it doesn’t suit her. I’m trying to watch this drama, because of LJS of course, n i don’t expect that much from suzy. It’s just to bad.. Because this drama could have better rates if…(you can guess it yourself b’cause it’s too painful) just trying to be honest. In my office… There are 5-6 people who love kdrama, especially LJS. But all of them don’t want to watch this drama. Great story but no chemistry, i love the villain and LJS.

  13. 63
    lululu Says:

    I think all idols turn actresses always get underestimated by public. They need time to prove their qualities.

    Tbh, I dont like Suzy as actress (I’ve watched her dramas since Dream High tho). But, I think WYWS is her best performance so far. I like her character here. Her acting improves too.

    I love WYWS. One of the best kdramas so far in 2017 for me.

  14. 64
    lestari Says:

    I like Suzy as an singer too, and I don’t see any progress in her acting in this drama (sorry for Suzy fans). Jung Eun Ji from A Pink and IU are so much better in acting than her, but in my opinion Suzy is a golden child in Korean Entertainment Industry so she is always having first opportunity to get involved in good dramas I think JYP must focus to improve her acting, because despite of her lacking in acting, she is a humble, nice and beatiful person that makes her popular.

  15. 65
    DeeAn Says:

    I can’t feel the cemistry betwen LJS and BS. They acting just so-so. Poor LJS the caracter not strong enough.
    BS face so flat on every emotion.
    Love the second lead actor police officer woo tak 😍😍

  16. 66
    tigerb Says:

    thought reading the comments would make me decide if i should watch this series based on the plot and story line, however most comments are about the lead actress. how unhelpful!

  17. 67
    Hannah Says:

    I don’t hate Suzy, but I don’t love her as an actress too. She’s the kind of idol-turned-actress who I don’t feel excited nor annoyed when she’s cast in a drama. However, I’d say that she has IMPROVED a lot in this drama. I love her in this, BUT I think she needs to work more on her crying scenes, it seems forced. Other than that, I’m starting to respect her as an actress, not just an idol. Fighting Suzy!

  18. 68
    damacrazy Says:

    I must say im not a fan of suzy but i am loving her in this. she is daebak in this drama

  19. 69
    Simon K Says:

    @tigerb, if you don’t care about who is the male and female lead, I would strongly recommend this drama based on story and directing. The story is not totally novel but there are enough twist and turns here and there. I also appreciate the way the director tell the story. Give it a chance unless you are one of those people who don’t like Suzy regardless of how she perform.

  20. 70
    Kdramaqueen Says:

    the rating so bad…

  21. 71
    tigerb Says:

    thanks, Simon K (#69) for giving me your thoughts on this series. don’t care much for suzy, or any other s.k. actor these days. just want to watch something different, hopefully not boiler plate.

  22. 72
    Yoly wang Says:

    Like Kyung Sang and Sung Kyung cameo …they are so funny…hope to see them paired up in a comedy drama!

  23. 73
    hana_goh Says:

    this drama is worth watching..if you don’t care about the rating or how other people think about suzy bad act all this time.. i enjoy this drama so i think it good to watch.. love the dreaming scene, love the funny scene.. Especially in this drama we can’t find cool LJS (like berfore in W or Doctor Stranger or Pinocchio), love his characters as not perfect man, but still awesome as poor and dirty prosecutor… recommended.. hwaiting all cast!

  24. 74
    sanjinyeon Says:

    Up to the last episode Kim Won Hae and Lee Jung Suk make me cry, but my tears are all tears of joy because the story is good and the ending is nice, all the actors and actresses who played their characters are all great, so every drop of my tears are worth falling for this kdrama.

  25. 75
    Wee Says:

    Yup..last episode make me cry so much….heart pain thAt oppa is crying so badly

  26. 76
    Stranger Says:

    Nicely wrapped ending..i love this story..all actors n production team..not too heavy as it have some sense of humour in each episode..i missed it alreadyy!! Pls make more great drama…tq

  27. 77
    Rifti Says:

    I like drama is the bestlah Suzy jongsuk 😘

  28. 78
    Chang mei Says:

    I really like this Drama,,😘😘😘

  29. 79
    sinopsis kdrama Says:

    this drama really really recommend… you must watch!!

  30. 80
    Simon K Says:

    I totally agree with #76 that the story was not too heavy, the director and writer shown some restrain, not like typical Korean drama. There are many illogical plots everywhere (like the prosecutor drinking beer with witnesses the day before the trial or personally prosecute someone who assault him). It probably will not become a classic that people still watching after 5 years but it certainly worth watching if you have not done that yet.

  31. 81
    kintan Says:

    WYWS is the best drama I ever watched,I can’t stop crying when the drama is end ㅠ.ㅠ

  32. 82
    secret Says:

    Love the story line, love the cast, love the ending <3

  33. 83
    Ibru Says:

    WYWS – the story is a masterpiece. It’s full of twists and turns but they are all significant to the main story. There are no loose ends here because it is a well-developed concept and perfectly-executed drama. In short, a must-watch from start to finish! The cast is….Who would have thought that Lee Jong Suk and Bae Suzy will have this chemistry? It is already given that Lee Jong Suk can really do romance and comedy and everything. LJS, you got me at your adorable aegyos and super cute scenes. Suzy, I’m not a big fan… but I think she was good in this role.
    OST is love! Lee Jong Suk sang 2 OST (Come to me, You would know) for this drama at first time in his acting career and you will love it for sure.
    You will not regret spending your time watching this drama!

  34. 84
    kam Says:

    Suzy bai and lee had an amazing love chemistry throughout the whole drama but the writer ended the drama very quickly.
    Suzy and lee were too good. and also the whole cast was nice and the villain was too good at his acting.

  35. 85
    While You Were Sleeping (2017) Complete 1080p HDTV - Asiautaf Says:

    […] You Were Sleeping (2017) Complete 1080p HDTV AAC H.264-NEXT Subtitle: Chinese, English, French koreandrama.org/while-you-were-sleeping-2017/ asianwiki.com/While_You_Were_Sleeping_(2017) […]

  36. 86
    shkbirain Says:

    Heartwarming AND HAPPY ending. everyone and everything fell into place. the bad guys paid for their sins while the good guys are richly rewarded maybe not in monetary value. It’s just a pity that Mr. Choi died in the ending scene.
    congratulations to all the actors producers, directors writers and staff for a job well done.

  37. 87
    Iris Johnstone Says:

    I love the drama a must watch from start to finish!!! the story is a masterpiece. The cast acting are really good. Suzy and LJS has a good chemistry. My they’re kiss is so natural but shows deepest emotions and very well portrayed by both of them. It is already given that Lee Jong Suk can really do romance and comedy and everything. All the OST songs is amazing specially “its you” by Henry, I love you boy by Suzy and Come to me by LJS.
    OST is love love love…. You will not regret spending your time watching this drama it is highly recommended. Honestly, I enjoy WYWS than the Goblin. For me WYWS is the best drama in 2017!!!!

  38. 88
    Anjali Says:

    I just love this drama …..Lee jong suk is my fav actor and his acting is febulous….I liked its concept of dreaming and what will happen in future
    Some time it will happen with me also so I liked this …..And LJS & suzy……😘😘😘😍😍😍😍😍😍😍
    I love their chemistry ….Its love to see them to gather I hope they will also work to gather in future I’m waiting for ur k drama in future 😍😍😘😘😘😘😘

  39. 89
    Anjali Says:

    I just love this drama …..Lee jong suk is my fav actor and his acting is febulous….I liked its concept of dreaming and what will happen in future
    Some time it will happen with me also so I liked this …..And LJS & suzy……😘😘😘😍😍😍😍😍😍😍
    I love their chemistry ….Its love to see them to gather I hope they will also work to gather in future I’m waiting for ur k drama in future 😍😍😘😘😘😘😘💚💛💜💝💝💞💞💞💞

  40. 90
    Thiri Says:

    I really hope this drama wins award.
    I want to dream like Nam Hong Joo and I want a protector like Jae Chan!
    This is the best drama of 2017 for me!
    Wish u luck “JaeJoo” couple ^___^

  41. 91
    Baejong Says:

    I love both of them,, they have a best chemistry even ever i watch a korean drama .. I love this visual couple 😍😍 #leejongsuk#baesuzy

  42. 92
    N Says:

    I love everything about this drama. From the story, to all the casts, plus the very confident acting of Lee Jong Suk! Which definitely made this drama worth watching. And he is so adorable!

    Highly highly recommended! 😀

  43. 93
    Maddy Says:

    I just love suzy and jong suk chemistry they were too good in this drama. Can’t believe it ended soon i love the whole drama so much characters were so good

  44. 94
    Rishel lyn Says:

    I love this kdrama ever….I love Lee Jung Suk..as long as Bae Suzy..

  45. 95
    Beti Says:

    why the artist’s name that play role as nam hong joo young was not included?

  46. 96
    Shana Says:

    So I can say this drama was very beautifully and dreamy.

  47. 97
    okheekim Says:

    올해 내가 본 가장 재미있는 드라마다 특히 이종석과 배수지 케미는 너무 훌륭했고 조연들 연기도 너무 좋았다

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