Franchot Tone filmed the club sequences in the early part of production before suffering a facial injury (Liam Sullivan claimed that he had fallen off a terrace to a driveway while picking a flower for a girlfriend; Rod Serling said that a jealous romantic rival had attacked him). Even though the left side of his face was swollen, it was decided not to hire a different actor and re-shoot the previously filmed scenes, but to film him with only his right side exposed to the camera. Interestingly, it caused Tone's character to be denied eye contact while mocking Sullivan's, which made his character more sinister and added an extra dimension of emotion to the plot.
The plot of a man accepting a bet that he could remain isolated (being unable to speak rather than having no direct human contact) for a year and the desperation of the one waiting for the bet to finish, was inspired by Anton Chekhov's short story "The Bet".
One of four The Twilight Zone (1959) episodes that, notably, contains no science fiction or fantasy elements.
This episode takes place from June 2, 1961 to June 3, 1962.
Liam Sullivan and Jonathan Harris both subsequently appeared together in His Majesty Smith (1966), in which Sullivan portrayed an alien called Nexus.