Guest Stars John Rolfe as Captain John Cater as Professor Krimpton John Harvey as Professor Brett Alan Curtis as Major Green William Mervyn as Sir Charles Summer John Boyd-Brent as Sergeant Gerald Taylor voices War Machine Operator / WOTAN Kenneth Kendall as Television Newsreader Carl Conway as U.S. Correspondent John Slavid as Man in Telehone Box George Cross as The Minister Edward Colliver as Garage Mechanic Dwight Whylie voices Radio Announcer