The Land That Time Forgot (1975)

American and German seamen form an uneasy alliance when they end up stranded on an island inhabited by prehistoric monsters as the First World War rages around them. Luckily, they discover an ancient fuel source, a find which increases their chances of escaping - but their hopes of reaching it in time are slim. Fantasy adventure, starring Doug McClure, John McEnery, Susan Penhaligon and Keith Barron.