Signal

Lee Je-hoon

as

Park Hae-young

Kim Hye-soo

as

Cha Soo-hyun

Cho Jin-woong

as

Lee Jae-han

Jang Hyun-sung

as

Kim Bum-joo

Jung Hae-kyun

as

Ahn Chi-soo

Kim Won-hae

as

Kim Gye-chul

Jung Han-bi

as

Oh Yoon-seo

Lee Yoo-jun

as

Jung Heon-gi

Kim Min-gue

as

Hwang Ui-kyung

Kang Chan-hee

as

Park Sun-woo

Im Hwa-young

as

Cha Soo-min