The Military Policeman opening the cell door to allow Sam a visit with Walt is wearing a brassard on his arm bearing the Shoulder Sleeve Insignia (SSI) of the 18th Military Police Brigade. The 18th MP Brigade was still deployed in Vietnam and not in California at the time. The correct SSI should be that of Sixth Army.
Jesse James was Poorboy in The Unnatural (The X Files), the kid who launched balls to Mulder and Scully in their famous baseball scene.