"Daydream Believer" was The Monkees' third, and final, #1 single. It was written by former The Kingston Trio member John Stewart.
By the calendar on the wall in the museum guards' office, around 15:12 and elsewhere, it's the month of February 1967 (though the year is blacked out). The calendar features ad art for Carta Blanca, a Mexican beer brand that is still in business.
Vic Tayback's third and final appearance on the series, each time as one of the villains-of-the-week, but never as the same character.
Musical numbers featured in this episode: 1. "Randy Scouse Git" 2. "Day Dream Believer".
The scene where Liberace destroys his piano was inspired by conceptual artist Montañez Ortiz whose famous piano destruction concerts involved destroying a piano using an ax.