Zack and Cody get to watch some of their baby tapes, and are dismayed to discover their parents used to get them mixed up. Meanwhile London's family seems to have lost all its money.
The twins want to play roller hockey but it's raining, so they play in the hotel lobby until they get caught by Moseby. They investigate Arwin's invention and find themselves in another dimension.
Cody is practising for the spelling bee that's to be held in the hotel, while Zack's scrounging money to play in the arcade. Cody finds himself competing against someone who's lent Zack money.
Mike decides that the couch is his best friend, so Molly decides it's time for a night on the town with her sister, Victoria.
Molly finds out that her wedding dress is too tight during her final fitting, three weeks before the big day. She goes on a diet but is on the verge of a meltdown.