This episode was based on an earlier Rod Serling TV play, in which a losing baseball team was saved by a 70-year-old pitcher. In the Twilight Zone version of this yarn, the old man was transformed into a muscular robot named Casey (Robert Sorrell), who comes to the rescue of the cellar-dwelling ball club skippered by Mouth McGarry. Winning game after game, Casey ultimately comes acropper when he suddenly develops human emotions -- and an unwillingness to see anyone lose a ball game! When first filmed in mid-1959, "The Mighty Casey" starred Paul Douglas as Mouth McGarry. Unfortunately, Douglas was in the last stages of the devastating illness that would kill him, and the producers were uncomfortable with his appearance on the screen. After Douglas' death, the episode was refilmed with Jack Warden as McGarry, with Alvin Ganzer taking over the directorial reins from Robert Parrish. "The Mighty Casey" finally aired June 17, 1960, as the next-to-last Twilight Zone of the 1959-60 season.