This was on the down low.

The deceased older lead and the recently deceased younger co-lead had an unusual competition on this adventure show with science fiction and horror overtones which was produced by this extremely successful movie and TV mogul. They would compete to sleep with whatever young actors came on set either as guest stars, regulars, extras, or crew. Neither man identified as homosexual although there were rumors about the older actor earlier in his career. This was on the down low. Strangely enough, they never had any desire to sleep with each other.