A gangster's moll offers to testify against him in court in return for police protection.
A missing bottle of rare wine leads Hart to the cellars of an eccentric vintner (John Hillerman).
Roger Hart fights against the clock to dismantle a time bomb at San Francisco's Candlestick Park.
An English Jewel thief, the Ocelot, escapes from a London jail and ends up in San Francisco, where he steals from a jewel shop. He leaves behind a rubber mouse, a sign of bravado that gives him away to Hart, who put him away five years ago. Hart and Dempsey pose as a wealthy married couple and check into a posh hotel, where the desk clerk is the Ocelot.
Hart joins the joggers' ranks to break up a drug smuggling operation.
Hart goes undercover in a prison in an attempt to learn where a thief hid the proceeds of a bank robbery.
Ron Moody plays a dual role as Detective Roger Hart and his father, Reggie, who gets taken for $4,000 by a pair of lady escorts.