Hart to Hart S03E10 - From the Depths of My Hart

Combining business with pleasure, the Harts scuba dive off the coast of Largos, testing an innovative underwater camera for the Navy. Early afternoon, as the Harts stroll along the beach, the body of a Navy SEAL working on the project washes on shore.

Note: This episode aired 37 days after Robert Wagner's wife, Natalie Wood, drowned off Santa Catalina Island.