In March 1914, a mining engineer named Richard Hannay tries to prevent Prussian agents from executing a political assassination designed to trigger World War I.
Directed by Don Sharp
Produced by Greg Smith
Written by Michael Robson
Based on The Thirty-Nine Steps
by John Buchan
Starring Robert Powell
David Warner
Karen Dotrice
John Mills
Miles Anderson
Timothy West
Music by Ed Welch
Cinematography John Coquillon