If G.K. Chesterton has taught me anything, it is this: we never know how the realm of the commonplace might be rich in things of eternal moment. A kind word, or act, might bear with it the weight of a life changing experience—or a treasured memory.
A snippet of the Guiness role as Father Brown is HERE
The movies are public domain now but not yet fully on line.
Guiness also played a spy in Smiley's people, Obi Wan Kenobi in Star Wars, and the fictional version of Cardinal Minszenty. video
There have been several series on Father Brown, mostly based on Chesterton's plots.
However, the latest BBC series (which hasn't arrived here yet) says that " The series is based on the character of Father Brown created by G. K. Chesterton, using new stories written for the program."
So one wonders if they will get it right.
On the other hand, I had to laugh at the new Sherlock figuring out a serial killer was a taxi driver who got away with it because "no one notices a taxi driver".
Uh, that plot was stolen from the plot of Chesterton's story "The Invisible Man".