* Harrison Ford as David Halloran
* Lesley-Anne Down as Margaret
* Christopher Plummer as Colonel Bartlett
* Richard Roundtree as Sergeant Williams
* Daniel Massey as Captain Bennett
* Michael Elphick as Charlie
* John Gielgud as Lord Willoughby
The film also features supporting roles played by:
* Shane Rimmer as Flight Lieutenant Miller
* Peter Jeffrey as Major Henderson
* Patrick Magee as the hotel concierge
* Tony Steedman as the pub landlord
* George Baker as The Commissioner
* Prunella Scales as the Commissioner's wife
* John Bird as a Sergeant
* Ken Hutchison as a pilot
* Brenda Blethyn as a waitress
This is not an exhaustive list, but it includes the most prominent roles in the film.