Get Smart (1965)

S4E14 One Nation Invisible

The Smarts' romantic honeymoon voyage takes a disastrous turn when their sailboat explodes. They find themselves stranded on a mysterious island that turns out to be under the control of the nefarious KAOS leader, Siegfried. As they navigate this unexpected challenge, the couple must use their wits and skills to outsmart Siegfried and find a way back to safety.