Quincy, M.E. (1976)

S8E10 Sword of Honor, Blade of Death

Michael Moroshima, an undercover cop with the Asian task force and Sam's close friend, is murdered while monitoring a deal involving the Yakuza and the Mafia. Sam informs Quincy about the Yakuza's principles and the Japanese code of honor, which compels Michael's father to seek vengeance for his son's death. Despite Sam's efforts to intervene and stop the cycle of revenge, he finds himself becoming increasingly entangled in the dangerous situation.