1x01 Red Light, Green Light

TV-MA

Lee Jung-jae

Seong Gi-hun, 'No. 456'

Wi Ha-jun

Hwang Jun-ho

Park Hae-soo

Cho Sang-woo, 'No. 218'

Jung Ho-yeon

Kang Sae-byeok, 'No. 067'

Oh Young-soo

Oh Il-nam, 'No. 001'

Heo Sung-tae

Jang Deok-su, 'No. 101'

Kim Joo-ryoung

Han Mi-nyeo, 'No. 212'

Anupam Tripathi

Ali Abdul, 'No. 199'

Lee You-mi

Ji-young, 'No. 240'

Park Hye-jin

Sang-woo's mother

Kim Pub-lae

Loan shark

Kim Gyeong-min

Racetrack man

Kim Yeong-ok

Gi-hoon's mother

Lee Seo-hwan

Gi-hoon's friend

Kang Mal-geum

Gi-hoon's ex-wife

Cho Ah-in

Seong Ga-yeong

Yun Seung-hun

'No. 369'

Hong Woo-jin

'No. 118'

Park Ji-hoon

'No. 250'

Park Seon-a

'No. 107'

Yoon Don-sun

'No. 119'

Im Gi-hong

'No. 322'

Lee Doo-seok

'No. 062'

Wie Ji-Yeon

Ha Sun Young [Teller]

Park Si-won

Cho Sang Woo [Young]

Kim Yeon-woong

Seong Gi Hoon [Child]

Han-sol Lee

No. 324

Gong Yoo