This episode is of obvious and particular interest to "Star Trek" fans, as both Leonard Nimoy and DeForest Kelley (as a doctor!) have roles. Additionally, the episode was written by John D.F. Black, who later worked on "Trek" as a writer and producer.
In addition to "Star Trek" stars Leonard Nimoy and DeForest Kelley, Jim Goodwin (Corporal Perkins) portrayed "Lt Farrell", a fellow crew member on the starship Enterprise.
DeForest Kelley playing an army doctor nurses Leonard Nimoy playing a wounded outlaw as he would do many times when the actors played Dr McCoy and Mr Spock in the series Star Trek.