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 (1964) house (aka, Stephens home.)
The title refers to the Loch Ness Monster an ancient plesiosaur reputed to inhabit Loch Ness in the Scottish Highlands. The first written account was in the 7th century and there have been over 1000 recorded sightings. In 1933, due to articles in various newspapers, more of the world became aware of this Scottish phenomenon. However, 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.