Musical number featured in this episode: "Your Auntie Grizelda".
The $200.00 which Dr. Mendoza paid The Monkees to play in 1967 would be worth approximately $1,553.00 in 2019.
The late John Hoyt (Dr. Mendoza) played iconic guest roles in nearly every 1960s American TV show. Arguably the most significant of these was Chief Medical Officer Philip Boyce of the USS Enterprise in the first ever "Star Trek" production, The Cage (1966).
The late Richard Kiel (the monster) had previously played Voltaire, the moronic assistant of diminutive mad scientist Miguelito Loveless in The Wild Wild West (1965). He went on to play the monstrous recurring villain Jaws in the 007 movie franchise.