Along with some of the best character actors of the period this was a flop from beginning to end. It also ended up being a bad break for an old high school buddy of mine that was cast as Captain Billings. Cliff Brand, not his real name, was an unknown at the time, remained unknown. I personally believe Cliff Brand could have evolved into a household name with the right screenplay. Murphy's law, it wasn't meant to be.
Review of Pony Express Rider
