

Season 1
Communicating via a walkie-talkie that transcends time, a profiler from 2015 and a detective from 1989 join forces to tackle crimes and injustice.
Cast & Crew
Episode Guide
Profiler Park Hae-young hears a man calling his name through a discarded two-way radio. The voice starts talking about an unsolved crime.
Season 1 FAQs
The cast of Season 1 includes Lee Yoo-jun as Jung Heon-gi, Jang Hyun-sung as Kim Bum-joo, Lee Je-hoon as Park Hae-young, Kim Won-hae as Kim Gye-chul, Jung Hae-kyun as Ahn Chi-soo, Kim Hye-soo as Cha Soo-hyun, Kang Chan-hee as Park Sun-woo, Im Hwa-young as Cha Soo-min, Cho Jin-woong as Lee Jae-han, Jung Han-bi as Oh Yoon-seo, and Kim Min-gue as Hwang Ui-kyung.
Episodes run about 1h 12 mins. The total runtime is about 19h 13 mins.
You can watch Season 1 on Netflix (Subscription), Amazon Prime Video (Subscription), Netflix Standard with Ads (Subscription), Amazon Prime Video with Ads (Subscription), The Roku Channel (Ads), and Tubi TV (Ads). Check this Fanbiz page for the latest platforms.
Season 1 was released on 22 Jan 2016.
Season 1 has 1 season and 16 episodes on Fanbiz. Available seasons include Season 2.










