Or Heaven Knows Mr. Allison. People are always getting Dick Van Dyke and Robert Mitchum confused for each other.
My first thought was the film about real life Navy radioman George Tweed surviving four years on Guam (or was it the Philippines?) which was made as “No Man is an Island.” IIRC, Tweed’s book about his experiences was called "Robinson Crusoe, U. S. N.
Sir Rhosis