Trivia

Clips of the car chase from this film are used in the Geico commercials "Do dogs chase cats?"

Tiffany Bolling and Keir Dullea were offered major roles.

Stuart Whitman's stunt double Tom Sutton also served that role for Whitman in his television series 'Cimarron Strip'.

The UK marketing and publicity centred on Martin Landau who was doing Space 1999 at the time of filming, with the UK posters having alongside Landau's name Star of TV's Space 1999.