Waterloo Road

A young English soldier early in World War II (John Mills), learning his wife is stepping out with a spiv (Stewart Grainger, in a different sort of role) goes AWOL to have it out with the wife-stealer.

For Americans it's an eye-opening peek into wartime London. It wasn't all sing-songs in the Underground. It was also people dodging the army with phony certificates, homebodies romancing the wives of men at the front and illicit sales on the black market.

The slang may be difficult for Americans who aren't Anglophiles.

The best parts are when Alistair Sim pops in as the kindly doctor and (infrequent) narrator.

It has nicely comic touches to relieve the melodrama and plenty of odd British characters. Thank goodness. And at the end Sim has a curious explanation for Hitler.