Don Gordon had been in many TV roles since the early fifties, but he didn't rate an opening helmet credit as a guest star.
Angelo De Meo (Doan) is a stunt coordinator for Combat.
While discussing Stevens with Lt. Hanley there is a flashback to D-Day. Saunders first encountered Stevens on the beachhead in Normandy. In the flashback, Saunders carries an M-1 Garand rifle instead of his signature Thompson sub-machine gun. He also wears a plain helmet without the camouflage cover and had PA-142 written in chalk on the front. This is consistent with his appearance in "A Day in June" from season 1.