The one line spoken by the murderous poker player ("That ace came off the bottom!") was dubbed by an uncredited Vic Perrin (The Control Voice).
The facial and hand prosthetics used for the Anderan Senator in this episode were previously worn by John Anderson as the Ebonite Interrogator in Nightmare (1963).
The Calco Galaxy Primitive facial prosthetic worn by Bill Hart in this episode was later worn by Janos Prohaska as the anthropoid ape creature, with an added fur suit, in The Cage (1966).
This episode has no closing narration.
Vic Perrin (The Control Voice) later voiced the Metron in Arena (1967), a story with many similarities.