Ironside (1967)

S5E20 Death by the Numbers

A series of killings shocks the community, with each victim discovered holding a numbered disk. When the fourth victim is found, it is revealed that the Commissioner possesses disk number six. To protect him, the Chief takes on the persona of number five, an eccentric and fiery artist who closely resembles him. This clever ruse is intended to ensure the Commissioner’s safety as the investigation unfolds.