The Foghorn Alfred Hitchcock Presents : Season 3 Episode 24

Lucia meets and falls in love with a man named Allen Bliss at a party that is a celebration of her engagement to another man: John St. Rogers. She decides to break the engagement. She later discovers that Allen is already married. The lovers decide to go for a ride in a sailboat to discuss their plans. They are subsequently lost in the fog and are never seen again.