Composer
Director
Screenwriter
Main Role
- Ji Chang Wook Main Role
- Won Jin AhGo Mi RanMain Role
- Yoon Se Ah Main Role
Support Role
- Im Won HeeSon Hyun Ki [Producer]Support Role
- Shim Hyung TakHwang Byung Shim / Hwang Dong Hyuk [Mi Ran’s ex-boyfriend / College professor]Support Role
- Kim Won HaeMa Dong Shik [Dong Chan's younger brother] | Ma Pil Go [Dong Chan's father] (Ep. 2)Support Role
- Jeon Soo KyungMa Dong Joo [Dong Chan's sister]Support Role
- Yoon Seok HwaKim Won Jo [Dong Chan’s mother]Support Role
- Jung Hae KyunKim Hong Seok [CEO of TV Show broadcasting]Support Role
- Park Choong SeonGo Yoo Han [Mi Ran's father]Support Role
- Kil Hae Yeon[Mi Ran's mother]Support Role
- Seo Hyun ChulHwang Gap Soo [Bio-research professor]Support Role
- Seo Jung YeonOh Young Sun [Byung Shim's wife]Support Role
- Park Hee JinPark Kyung Ja [Mi Ran's friend]Support Role
- Oh Ah RinMa Seo Yoon [Dong Shik's daughter]Support Role
- Lee Moo SaengJo Ki Beom [Gap Soo's aide]Support Role
- Yoon Na MooGo Nam Tae [Mi Ran's little brother]Support Role
- Choi Bo MinHwang Ji Hoon [College Student / Byung Shim's son]Support Role
- Kang Yoo SeokPark Young Joon [Hwang Ji Hoon's friend]Support Role
- Hong Seo BaekProducer LeeSupport Role
- Han Jae YiPD SoSupport Role
- Nam Min WooKim Ji Oh [PD]Support Role
- Lee Do YupBaek Yeong Tak [Detective / Dong Joo's ex-husband]Support Role
- Kim Bup RaeLee Seok Du / Lee Hyeong Du [CEO of Unsung group]Support Role
- Jeon Jin Oh[Seok Du's secretary]Support Role
- Lee Bong RyunPark Yoo Ja [Fortuneteller]Support Role
- Kim Min Chul[Teacher Assistant]Support Role
- Lee Joo YoungLee Hye Jin [Dong Sik's wife]Support Role
Guest Role
- Lee Byung HunKim Jin [1999's Hyun Gi's aide] (Ep. 1-2, 10)Guest Role
- Lee Hong KiSon Hyun Gi [1999 self] (Ep. 1-2, 10)Guest Role
- Cha Sun WooHwang Byung Shim [1999 self] (Ep. 1-2)Guest Role
- Chae Seo JinNa Ha Young [1999 self] (Ep. 1-3)Guest Role
- Oh Ha NeePark Kyung Ja [1999 self] (Ep. 1-4, 11)Guest Role
- Song Ji EunOh Young Sun [1999 self] (Ep. 1-4)Guest Role
- Kang Gi DoongMa Dong Shik [1999 self] (Ep. 2, 11)Guest Role
- Han Da SolMa Dong Joo [1999 self] (Ep. 2)Guest Role
- Lee Do GyeomBaek Yeong Tak [1999 self] (Ep. 1-2)Guest Role
- Park Min SuGo Nam Tae [Child] (Ep. 1-3)Guest Role
- Tony AhnHimself [Award show MC] (Ep. 1)Guest Role
- Robin DeianaNikolai [Killer] (Ep. 1)Guest Role
- Kim WookJo Ki Beom [1999 self] (Ep. 1-3)Guest Role
- Choi Ri[Woman who rides water-bike with Byung Shim] (Ep. 1)Guest Role
- Seo Sang WonDr. Yoon (Ep. 3-4, 6, 12)Guest Role
- Im Jae Geun[Music store owner] (Ep. 3)Guest Role
- Choi Na Moo[Police officer] (Ep. 3)Guest Role
- Yang Hyun Min[Thug] (Ep. 5-6)Guest Role
- Ra Mi RanKang Ok Bong [Panelist] (Ep. 6)Guest Role
- Kim Soo RoYoo Ji Min [Panelist] (Ep. 6)Guest Role
- Jung Myung JoonYoo Woo Jun [Panelist] (Ep. 6)Guest Role
- Jung Sung Ho[Debate show MC] (Ep. 6)Guest Role
- Kwon Hyuk Soo[President of South Korea] (Ep. 6)Guest Role
- Kim Jong GooKim Shi Seok [Hong Seok's boss] (Ep. 7-8, 12)Guest Role
- Yoon Joo ManTerry Kim / Kim Hyeon Do [Lee Seok Du's Hitman] (Ep. 7, 9-12, 14-15)Guest Role
- Han Ki WoongLee Jung Woo [Lee Seok Du's son] (Ep.12-13)Guest Role
- Park Jin YoungJang Woo Shin [Man who wants to go inside the cryonic capsule] (Ep.14)Guest Role
- Choi Dae SungKim Jin [Present Self]Guest Role
- Yeom Dong HunSeo Yoon Suk [professor]Guest Role
- Joo Byung Ha[Police officer]Guest Role
- Amy Aleha[News anchor]Guest Role
- Kang Ro ChaeNurse Seol Soo JinGuest Role
- Henny Savenije Guest Role
- Lee Gyu Sub Guest Role
- Jang Ye Rim[Experiment woman]Guest Role
- Nam Ga Seol[Young Joon's fling]Guest Role
- Song Hoon[Ma Dong-Ju's ex-husband]Guest Role
- Kim Jae CheolReporter Kim Wu Se, Wonders Media (Ep 6)Guest Role
- Choi Soo Hyun[Nurse]Guest Role
- Lee Kwang Ik[Employee]Guest Role
- Kim Do Won[Telescope kid]Guest Role
Unknown
- Oh Ji Yeon Unknown
- Yoon Cha Young Unknown
Bit part
- Jang Young Hyuncellphone store employee (Ep.2)Bit part
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