Beetlejuice: Season 2, Episode 7
The Really Odd Couple/A-Ha! (20 Oct. 1990)
First, Beetejuice wrecks The Monster Across Tnbe Street's home, causing The Monster and Poopsie to move in with him. Then Doomie suddenly disappears, and in order to find him, Beetlejuice transforms himself into the Neitherworld's greatest detective -- Sherlock Homely.