GRAND NATIONAL NIGHT began life as a stage play, which was promptly adapted as a popular British radio serial. The film combines the best elements of both previous incarnations. Racehorse owner Gerald Coates (Nigel Patrick) accidentally kills his spiteful wife Babs (Moira Lister) during a quarrel. Terror-stricken, Coates stashes the body in the boot (or trunk) of a stranger's car. Methodical police inspector Ayling (Michael Hordern) suspects there's more to this than meets the eye. The script carefully builds up sympathy for the frenzied Coates, then manages to find a way to wrap up the story to everyone's satisfaction (Here's a clue provided by Leonard Maltin: while watching the film, examine the character names).