The War Machines is the ninth and final serial of the third season of the British science fiction television series Doctor Who, which was first broadcast in 4 weekly parts from 25 June to 16 July 1966. The serial is set in 1960s London, shortly after construction of the Post Office Tower was completed. In the serial, the time traveller the First Doctor (William Hartnell) and sailor Ben Jackson (Michael Craze) work together to stop the self-thinking computer WOTAN (voiced by Gerald Taylor) from invading London with the deadly War Machines controlled by WOTAN.