Mouth McGarry was originally played by Paul Douglas but he became too ill. They had to refilm it with Jack Warden. Douglas was known as a heavy drinker and his gaspy line readings and flushed apppearance gave many of the crew the impression that he had started drinking again, which he and his agent vehemently denied. Douglas died of an incipeint coronary shortly after shooting. As Serling later remarked, "We were watching him literally die in front of us."