Roddy McDowall stars Hugh Aylesworth, as a well-bred English youth who is evacuated to America during the London blitz. Hugh moves into the home of Mr. and Mrs. Andrews (Don Douglas and Katherine Alexander), both of whom are charmed by their little guest's impeccable manners. Less charmed is the couple's own son Don (Freddie Mercer), who not only feels neglected, but considers Hugh a royal pain in the posterior. But Hugh proves himself a "regular guy" when he helps Hugh foil a particularly scabrous schoolyard bully (Stanley Clements). For reasons unknown, On the Sunny Side never seems to show up on TV, not even in the wee small hours.
by Hal Erickson synopsis