The Detective

The police find a man dressed as a priest with his hands in a safe. They arrest him but he turns out to be Father Brown (Alec Guinness) who was returning the money stolen by a parishioner. The church is sending the Holy Cross of Saint Augustine to the Eucharistic Congress in Rome. The police tell them that elusive thief Flambeau is after the priceless artifact like the many treasures he has stolen in the last 10 years. Nobody knows what the master of disguise actually looks like. Father Brown determines that the police would be easy targets for Flambeau and transports the Cross himself. Eventually he is alone with Flambeau as intended and he tries to reform him. Flambeau refuses and escapes with the Cross. Despite the disappointment, he tries to entice Flambeau again with the help of Lady Warren.

Alec Guinness is great as Father Brown. It's a great character and Guinness is magnificent playing him. It's a fun mystery for awhile until Flambeau is revealed. Then it repeats again and again for Father Brown. It's fun to watch him in a caper to catch Flambeau. It's less fun to watch him try to convert Flambeau. Guinness always tries to keep his character light and fun.