AllMovie

Chasing after a known murderer, Tony Penner (Peter Virgo Jr.), a member of a neighborhood vigilante group, fires into a darkened warehouse--and ends up killing an innocent bystander. Although Quincy can understand the frustrations which have led to "mob rule" in the streets of LA, he insists that the forensic evidence be used to prosecute Penner. Meanwhile, Tony's fellow vigilantes, feeling betrayed by the authorities, prepare to exact a terrible revenge against the fugitive murderer. Originally scheduled to air on April 8, 1981, this is the final episode of Quincy, M.E.'s sixth season.