While You Were Sleeping
SuzyNam Hong-joo / Theme Song Performance Lee Jong-sukJeong Jae-chan Lee Sang-yeobLee Yoo-beom Hwang Young-heeYoon Moon-seon Shin Jae-haJeong Seung-won Park Jin-jooMoon Hyang-mi Lee Ki-youngPark Dae-young Min Sung-wookLee Ji-gwang Lee Bong-ryeonGo Pil-sook Lee Do-gyeomMyeong Dae-goo Nam Da-reumYoung Jeong Jae-chan Shin Yi-JoonYoung Nam Hong-joo Lee Jae-kyoonChoi Dam-dong Go Woo-rimYoung Jeong Seung-won / Chan-ho Kim Da-yeKang Cho Hee [Dae Hee's sister / Barista] Baek Sung-hyunDo Hak Young [Cable Man] Jang So-yeonDo Geum Sook [So Yoon's mother] Moon Ah-ramYu Beom's firm's receptionist Kang Ki-youngKang Dae Hee Hong KyungChoi Wook Hyeon [Deserter] Uhm Hyo-seopPark Jun Mo [So Yoon's father] Jeon Kuk-hwanSoo Kyung's father Kim Ki-cheonLee Hwan's father Jang Hyun-sungJung Il Seung Cho Mi-nyeoJi Kwang's Paralegal Cha Jung-wonYoo Soo Kyung [Archer] Moon Yong-seokLee Hwan [Tae Min's student] Ryu Tae-hoProfessor Moon Tae Min Jeong Hyun-seokChan Ho's doctor Lee Jae-wonJo Yoon Pyo [Phone Buyer] Lee Min-jaeSeung Won's classmate Yoo In-sooSeung Won's classmate Lee Na-raHa Joo-an (IV Drip Serial Killer) (Eps 3) Yeo Hoi-hyeonLee Yu Beom [Young] Choi Won-youngNam Chul Doo [Hong Joo's father] Lee Jung-eunJae Chan's mother Shin Eun-jungKim Joo Young Jo Yeon-hoIm Se Young [Witness] Lee Joo-sukPresiding judge Hong Hee-wonDoctor Expert Witness Yoon Yong-hyeonPark Dae Young [Phone thief] Lim Ga-YoungHigh school student Shim Wan-junMan with mustache Park Young-sooCar salesman Woo Sung-minKindergartner Kim Su-inThief's daughter Lee Ga-ryeongHospital Coordinator Lee Hae-riTheme Song Performance SuzyNam Hong-joo / Theme Song Performance Roy KimTheme Song Performance Kang Min-kyungTheme Song Performance Henry LauTheme Song Performance 
