Mr. and Mrs. North: Million Dollar Coffin

A gang of bank robbers kill an indigent man to store the loot in his coffin, and agree to come back years later to dig up the body and collect their shares once the heat is off. One member of the gang decides to jump the gun and take the money for himself, at the same time, Jerry and Pam come with an author to dig up an adjacent coffin for research purposes. Season 1, Episode 39 (1953)