Escape to Athena

A ragtag group of prisoners -- Italian chef Bruno (Sonny Bono), British archeology professor Blake (David Niven), American soldier Nat (Richard Roundtree) and Greek prostitute Eleana (Claudia Cardinale) -- befriend each other in a Greek POW camp run by Otto Hecht (Roger Moore), an art-loving Nazi officer. With the help of local resistance fighters, the inmates plot to escape and steal valuable artifacts from a heavily guarded monastery that's used as a storehouse.