
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.

A stranger contaminates the Harts' pool, blinding Jonathan, then attacks him in the hospital.

The Harts find murder and intrigue at the track as they prepare for their Thoroughbred's debut.

The Harts' test of a new underwater camera leads to murder and rumors of underwater treasure; guests Pat Hingle, Sandahl Bergman.

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