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The Twilight Zone: 2x9

The World Next Door

A hen-pecked man with a boring life and a secret yearn to build inventions finds a secret door in his basement that leads to a parallel world. In that world, his counterpart is a rich famous inventor in a Victorian-style setting who is equally bored with his life. The two switch lives and are happy ever after.

The Twilight Zone: Season 2 Episode 9
Oct. 18, 1986