"Alias Mr. Hackenbacker" is the 29th episode of Thunderbirds, a British Supermarionation television series created by Gerry and Sylvia Anderson and filmed by their production company AP Films (later Century 21 Productions) for ITC Entertainment. Written by Alan Pattillo and directed by Desmond Saunders, it was first broadcast on 16 October 1966 on ATV London and Anglia Television as the third episode of Series Two.