In this episode, Bernie Kopell portrays Baron von Fuchs in a manner, both in voice and appearance, to his Get Smart (1965) character, KAOS Agent and archenemy of Maxwell Smart, Siegfried.
On the North End of "Columbia Ranch" was a 'swamp' that doubled as Loch Ness. South End of "Columbia Ranch" was (is) The "Bewitched" house (aka, Stephens Home.)
The title refers to the Loch Ness Monster an ancient plesiosaur reputed to inhabit Loch Ness in the Scottish Highlands and was first brought to the world's attention in 1933. No scientific evidence has ever been found and most "evidence" has been disputed or fabricated. Known locally as "Nessie."
Elizabeth Montgomery is credited under her real name in the role of Samantha Stephens. She is credited as Pandora Spocks in her role of Samantha's look-a-like cousin, Serena.