Kojak has cultured an informant to solve a series of gangland killings. An assistant chief inspector, often passed over for promotions, sees an opportunity to achieve the position of commissioner he so desperately desires. He moves in on Kojak's investigation, though he is sabotaging it and is a danger even to himself. Kojak tries to sidestep him but risks an inquiry launched by the vengeful senior officer (played by Danny Thomas). After a successful capture of the gang bosses, the truth comes out at the inquiry, but Theo is gracious, not gloating.