AllMovie

Alec Guinness stars as Father Brown, full-time priest and part-time sleuth, in this comic mystery based on the character created by novelist G.K. Chesterton. When Father Brown is entrusted with transporting a valuable religious artifact from London to Rome, he's understandably upset when it's stolen from him. Brown has reason to believe that a notorious international thief lifted the cross he was carrying, and the good Father finds himself on a dual-purpose mission: to recover the stolen goods and to compel the thief to repent before God. The supporting cast includes Peter Finch, Joan Greenwood, and Cecil Parker as the Bishop.