Tennis star Pancho Segura makes a guest appearance in this episode, the plot of which predates Ground Hog Day by nearly three decades. When Tony (Larry Hagman) shows signs of working too hard, helpful Jeannie (Barbara Eden) arranges a long rest for her master, by changing every day into Sunday. Thing of it is, only Tony is aware that the entire world is reliving the same day, over and over...and it's driving him bonkers! ~ Hal Erickson, Rovi