During 'Spin the Bottle' Peter Tork's position on the floor changes as he says, "It always happens this way."
When Micky Dolenz is imitating Sigmund Freud, he wears glasses in the wide angles, but not during close-ups.
Michael Nesmith mispronounces the title of his own composition "You Just May Be The One" as "You May Just Be The One". The title is also spelled this way during the end credits.