Double-agent Alexander Eberlin is assigned by the British to hunt out a Russian spy, known to them as Krasnevin. Only Eberlin knows that Krasnevin is none other than himself! Accompanying him on his mission is a ruthless partner, who gradually discovers his secret as Eberlin tries to maneuver himself out of a desperate situation.

• Columbia British Productions
• Laurence Harvey
• Tom Courtenay
• Mia Farrow
• Harry Andrews
• Peter Cook
• Lionel Stander
• Per Oscarsson
• Barbara Murray