The Great Raymondo learned "The Great Milkcan Escape" from Houdini himself. Before the "World Magic Championship," Cregg Demon said that he was going to present "The Great Milkcan Escape," and it was Houdini's ghost who told him how in a dream, after Lisa told the secret to his son. When he started to perform the trick, he said that he hoped Houdini was watching up there, as he did for Houdini's great-grandniece.[1]
The southern sheriff put handcuffs on Maggie, but they slipped off her hands. The sheriff said, "It looks like we got a teeny Houdini here."[2]
During a séance for Comic Book Guy, they resurrected Harry Houdini. He thought he'd reveal the secrets of the afterlife to the world but was captured by a flying cat and a flying elephant, who took him back to Heaven.[3]
Episode – "Grade School Confidential" (mentioned)
Comic story – Small-Time Travelers (played by Milhouse)
Book – Bart Simpson's Guide to Life (mentioned)