Last show of the series. The cliffhangers - whether Frankie survived, what happened to Scott after Sable took him, and the infamous UFO scene--were never resolved onscreen.
Ned E. Davis, a second assistant director on this episode, portrays the alien. In a May 2022 interview on BBC2 Radio, Ned E. Davis revealed that the suit he wore was formerly worn by Leonard Nimoy in a Star Trek film.