Plot summary
It is Halloween at the Tipton. When looking for Arwin, Zack and Cody accidentally release a robot Frankenstein monster (created by Arwin), who is almost an exact replica of Arwin. The employees think 'Arwinstein' is Arwin in his costume for Halloween. Meanwhile, London is hosting a Halloween party at the Tipton, which has a costume contest, and the winner gets diamonds. Arwinstein shows up at the party and becomes the winner of London's costume contest. Soon, Arwinstein kidnaps Carey and everyone finds out that Arwinstein is a monster. Guest star: Bo Crutcher as Skippy, Wilson Davis as Arwinstein Double, Dave Matos as Arwin Double, Aaron Musicant as Lance, Adrian R'Mante as Esteban, Brian Stepanek as Arwin/Arwinstein Absent: Ashley Tisdale as Maddie Fitzpatrick
Credits
Adapted from Wikipedia contributors, The Suite Life of Zack & Cody season 3. HTML formatting and reference markers removed.