"Attack of the Alligators!" is an episode of Thunderbirds, a British Supermarionation television series created by Gerry and Sylvia Anderson and filmed by their production company AP Films (APF) for ITC Entertainment. Written by Alan Pattillo and directed by David Lane, it was first broadcast on 10 March 1966 on ATV Midlands as the 23rd episode of Series One. It is the 24th episode in the official running order.