When Father Mac is looking at the newspaper clipping about the boy being hit by the train, one of the other headlines is for a story about Bangladesh seeking additional relief aid for flooding. This episode is set in 1963, when Bangladesh was still known as East Pakistan.
Sam tells Father Mac to take his abstinence from alcohol "one day at a time" and Father Mac acts as if it's the first time he's heard that saying when, indeed, it's been in alcoholics anonymous since its inception in the 1930's.
As Tony Pronte is crossing the cemetery, there are palm trees in the background. The episode takes place in Philadelphia where there are no palm trees.