Jonas Wilde, a British secret agent licensed to kill, wants to resign from his murderous work, but his superiors pressure him into taking on a new assignment-the assassination of a defecting Soviet scientist. In the course of the dangerous mission, he discovers a mole has infiltrated British intelligence.

• Amicus Productions
• United Artists
• Richard Johnson
• Carol Lynley
• Barbara Bouchet
• Sylvia Syms
• Gordon Jackson
• Diana Dors
• Maurice Denham
• Sam Wanamaker