Revealing mistake: When Cody falls through the air vents, you can obviously see that it's a dummy. When "he" falls, his body is perfectly straight. If you really were falling, you'd be screaming and moving.
The Suite Life of Zack and Cody (2005)
1 revealing mistake in season 3 - chronological order
Starring: Ashley Tisdale, Brenda Song, Cole Sprouse, Dylan Sprouse
Visible crew/equipment: At the beginning, you can see studio lights reflected on Zack's guitar during the song "Schools Out". (00:00:55)
[London is opening a fashion boutique.]
Mr. Moseby: How's the boutique business coming, London?
London Tipton: it's going to be fabi! I'm putting purses over here and matching belts over there.
Mr. Moseby: And do you have a business plan?
London Tipton: Weren't you listening? I'm putting purses over here and matching belts over there.
Maddie Fitzpatrick: No, no, he's talking about financial planning. Ordering stock, taking inventory...
London Tipton: I said, I'm putting purses over here and matching belts over there.
Trivia: London Tipton was supposed to be somewhat named after Paris Hilton. London and Paris (both cities) and Tipton and Hilton (Hotels).
Question: What Happened to Muriel? Around season two she disappeared.
Answer: Keep in mind, Muriel wasn't very popular. So the writers/directors must have thought it'd be a good idea to let go of the character. No one seems to be complaining.