Jonathan Hart (Robert Wagner) was a self-made millionaire and the CEO of Hart Industries, a Los Angeles-based global conglomerate. His wife Jennifer (Stefanie Powers) was a beautiful freelance journalist. Living the jetset lifestyle, the glamorous couple spent their free time as amateur detectives and in every episode they found themselves involved in cases of smuggling, theft, international espionage, or most commonly, murder. At their opulent California home, they were assisted by Max (Lionel Stander), their loyal, gravelly-voiced butler, cook, and chauffeur who also helped out in their "cases." The Harts' beloved pet dog was "Freeway," so named because he was a stray they had rescued when he was found wandering on the freeway.