A rash of car thefts appear to be connected to a particular radio station and a puzzling code. Pete becomes friends with the car thief while Julie and Linc check out the station.
A Korean girl finds trouble in her search for her American father. Pete accidentally hits her with his car after she runs from the scene of a murder she witnessed, and the killers are still after her.
A little girl's father gets in trouble with jewel thieves just before Christmas. He leaves his daughter with Pete, an old friend, but then doesn't return for her as promised, and the trio tries to find him.
The trio investigates a euthanasia that may turn out to be murder. The accused man, who killed his terminally ill wife, claims she was in intolerable pain, but doctors say she was receiving too much morphine to be suffering that much.
The visit of Captain Greer's eccentric Uncle Max, a Greek painter, coincides with a series of art thefts. The robberies are baffling police as the guards can recall no one entering or leaving the galleries.
