Simpsons Season 8, Episode 24: The Simpsons Spin-Off Showcase

Troy McClure hosts a show which features three ideas for spin-offs to The Simpsons:

Chief Wiggum, P.I. – Chief Wiggum and Seymour Skinner are detectives in New Orleans.
The Love-Matic Grampa – Grampa's soul is contained in Moe's Love Tester machine.
The Simpson Family Smile-Time Variety Hour – The Simpsons host a 70s variety show, with Lisa replaced by an adult bimbo.