The square gold coins Stella offers to Buck as payment for Twiki are colonial cubits from Galactica 1980 (1980).
When Twiki ejects from the ship, Belzack exclaims, "The Drone is out of the ship," and as the camera stays on him it is clear that he then says the F-Bomb, but there is no audio.
Eddie Benton (Stella) also appeared in The Shape of Things to Come (1979), a sequel to Things to Come (1936), released only a few months after Buck Rogers in the 25th Century (1979).