This was the last episode of Knots Landing (1979) to be broadcast before Conundrum (1991), the series finale of Dallas (1978), on May 3, 1991. Ted Shackelford and Joan Van Ark appeared in that episode, playing versions of Gary and Valene from an alternate reality in which J.R. (Larry Hagman) was never born. In this alternate reality, Gary and Valene meet for the first time when they are middle aged and arrange to have dinner with the suggestion being that the two of them will eventually end up together.