Park Hae-young (played by Lee Je-hoon) is a protagonist in Signal.
Criminal profiler who discovers a walkie talkie connecting him to the past. He collaborates with a detective from the 1990s to solve a 15-year-old kidnapping and murder case, later helping to form a cold case team and investigating the mystery surrounding his partner's disappearance. Cha Soo-hyun (played by Kim Hye-soo) is a protagonist in Signal.
Detective who leads the newly formed cold case team. She has spent 15 years searching for Jae-han, who is her long-lost mentor and unrequited love. Lee Jae-han (played by Cho Jin-woong) appears in Signal.
A detective from the 1990s who communicates with the present via a mysterious walkie talkie. He helps solve cold cases and has been missing since the year 2000, prompting a long search by his colleague. Kim Bum-joo (played by Jang Hyun-sung) appears in Signal.
Ahn Chi-soo (played by Jung Hae-kyun) appears in Signal.
Kim Gye-chul (played by Kim Won-hae) appears in Signal.
Oh Yoon-seo (played by Jung Han-bi) appears in Signal.
Jung Heon-gi (played by Lee Yoo-jun) appears in Signal.
Signal (2016) interactive character relationship network and AI-powered story timeline. Explore the connections, alliances, and conflicts between characters across the narrative arc.
AI Narrative Summary
Time-bending crime thriller connecting past and present through a walkie-talkie
Character Network — 10 Characters
Park Hae-young (Lee Je-hoon) — protagonist Criminal profiler who discovers a walkie talkie connecting him to the past. He collaborates with a detective from the 19...
Cha Soo-hyun (Kim Hye-soo) — protagonist Detective who leads the newly formed cold case team. She has spent 15 years searching for Jae-han, who is her long-lost...
Lee Jae-han (Cho Jin-woong) A detective from the 1990s who communicates with the present via a mysterious walkie talkie. He helps solve cold cases a...
