Who Ghost There? is an episode of the Alvin and the Chipmunks series.
The Chipmunks are stuck at home without lights and think the house is haunted. Simon suspects a ghost inhabits the house when he finds a note. Believing there's actually a ghost, they each attempt to find out what it wants. After mistaking Dave for the ghost (he had laryngitis so they couldn't tell), Theodore discovers the missing piece of the note and learns that the ghost wants to be left alone. At the end, the ghost is seen eating the graham crackers and drinking milk Theodore put out for him earlier.
- "Ghostbusters" originally performed by Ray Parker Jr.
- The title is a pun on the saying "Who Goes There?"
- Part of the Alvin and the Chipmunks in Chipmunkmania VHS.
- This episode makes a reference to the movie Ghostbusters.