In a very rare situation the audience witnesses four castaway characters in romantic circumstances where they actually kiss on the lips: the Professor with Ginger, and Gilligan with Mary Ann.
Denny Miller (Duke) went on to play Tongo The Ape Man in the later installment "Our Vines Have Tender Apes".
The Professor and Ginger kiss for the first time. They will kiss a second time in #2.7: "Castaway Pictures Presents."
Denny appeared in two episodes: one in 1965 and one in 1967. Two years later in 1969, Denny married Kit Smythe, the actress who played the first Ginger on the "Gilligan's Island" pilot.