The Passenger (1971)

Infidelity, murder. David Walker, wealthy Company Director, finds himself involved in both. Detective-Inspector Martin Denson is called to investigate an intriguing and complicated case.

A confession of murder in a suicide note should be conclusive, but Detective Inspector Martin Denson finds it is not quite as simple as that. Particularly as it leads him to another murder...

Denson's investigation is concluded with an exciting chase, and an unexpected revelation.