
Self-made millionaire Jonathan and freelance writer Jennifer are the Harts - a globetrotting married couple with a talent for finding mysteries wherever they go. And even when they're uncovering thefts, espionage and assorted skullduggery, they still find time for romance.

The Harts become the unwitting possessors of a priceless stamp and the targets of a desperate collector; guest William Daniels.

Jennifer learns her father (Ray Milland) is a former intelligence agent targeted for vengeance.

A beauty-salon operator hypnotizes Jennifer into stealing her friends' jewelry; guest David Hedison.

Vacationing in Hawaii, Jennifer overhears a woman's plot to kill her husband, a wealthy businessman.