Includes a brief tribute to tap dancer Nick Castle, who died August 28, 1968, a month before this episode aired. Castle is seen in a brief comedy bit, after which Dan Rowan and Dick Martin remark on how great he was.
As indicated in the blooper reels, Goldie Hawn was initially terrified of doing her trap-door scene from early in this episode (where she says, "Funny, he doesn't look Cubish!"), and it took several takes, as she was almost panicking while standing nervously on the trap door. She asked the cast if it was safe, as if she was falling or jumping, but Judy Carne, offstage, assured her it was all right, like jumping. So in the penultimate take, when Goldie says her line, there's a thump heard, but the trap door doesn't open! (It was stuck.) She and the offstage cast members laughed, and she carefully stepped off the trap door platform. Eventually, she did the final take, as seen in the episode, and she turned out fine.
Dick Martin's computer job interview is a virtual (slightly longer) copy of Peter Tork's interview in Monkee vs. Machine (1966), the third episode of The Monkees (1965). (Both include David Panich in their writing credits.)