The Eiger Sanction is a 1975 American action film directed by and starring Clint Eastwood. Based on the 1972 novel The Eiger Sanction by Trevanian, the film is about Jonathan Hemlock, an art history professor, mountain climber, and former assassin once employed by a secret government agency, who is blackmailed into returning to his deadly profession for one last mission. He agrees to join an international climbing team in Switzerland planning an ascent of the Eiger north face to avenge the murder of an old friend. The Eiger Sanction was produced by Robert Daley for Eastwood's Malpaso Company, with Richard D. Zanuck and David Brown as executive producers, and co-starred George Kennedy, Vonetta McGee, and Jack Cassidy.