This is Stagecoach West starring Wayne Rogers .
Directed by Don McDougall. With Richard Eyer, Wayne Rogers, Robert Bray, James Dunn. A retiring bookkeeper agrees to help a businessman destroy his factory for the insurance money backfires when the owner is killed in a bungled robbery by his wife’s lover. The crook joins the husband and wife on Luke’s stagecoach for their trip to San Francisco and tries to steal the five thousand dollars the bookkeeper received as a retirement gift en route. Thanks to David Bassler for writing this summery.