Dr. Ko Lap-yan heads a team of senior psychiatrists and residents at the Yan Wo Hospital in Hong Kong. Most episodes revolve around the team diagnosing patients. With a specialty at diagnosing criminals, Ko also has close ties with the Serious Crime Unit of the Hong Kong Police Force, a unit headed by Senior Inspector Chung Kwon-ban. The second series sees Ko's resignation from the Yan Wo Hospital; he is later transferred to a new psychiatric department, the Forensics Psychiatry Department, of Bok On Hospital, where he formally diagnoses criminals.
as Yuen Man Hon
as Ko Sau Yee
as Cheng Sum Yau
as Lee Tsz Yan
as Chan Kwong Leung
as Suen Ka Pik
as Lui Wing Chi
as Lee Ying Chun
as Chan Mei Kuen
as SIP Chung Kwok-ban
as WPC Mandy M.Y. Mok
as Dr. Leo Fong Wing-chun
as 高立仁
as 菲比斯
as Yu Kwan Wai
