Franchot Tone filmed the club sequences in the early part of production. Then, something happened that caused him damage to the left side of his face. Tone's account of the incident, according to Liam Sullivan, is that it was an accident. He fell off a terrace trying to pick a flower for his girlfriend and fell on a driveway. Serling says it was Tone hitting on someone else's girlfriend in a parking lot. The boyfriend took offense and beat up Tone. Regardless of the cause, the left side of his face was temporarily puffed up. Rather then reshoot with a different actor, the director filmed the remainder of Tone's scenes, in the glass-room chamber, with the actor in profile so that you never see the left side of his face. This means that Tone's character is taunting Tennyson without ever actually facing him, giving the character an even more sinister aspect.