You can see him Here right after the 20:00 mark. It’s his only scene. Tall actors of that era would be Richard Kiel, Ted Cassidy, and as a long shot, James Daris. Quality isn’t well enough to trust my eyes to make a positive id, although I don’t think it’s Cassidy.
Hard to find pics of Daris to compare, probably best images might be in a Hawaii Five-O, Time Tunnel, or Mannix episode.
It looks like Ted Cassidy to me. Here he is without makeup.
I’d say Ted Cassidy too.
OK. I guess the I couldn’t see past the dark brown hair, which Cassidy didn’t normally have IRL.
Ted Cassidy isn’t listed in the credits at the end of the episode. He isn’t listed in the acting appearances in his IMDb television appearances as ever having been on the show. Sometimes extras are not credited in the credits for a television show. However, at that point he had already been the fourth highest listed actor in The Addams Family for all 64 episodes of the two years it was on television (and that was from 1964 to 1966). That’s a rather strange thing to not list a well-known actor in the credits.
I can just imagine him saying “You rang?” as he walks through that door!
I know you meant well. 
Anyway. . . the credits for bit players on variety shows are sketchy. Sometimes they’re listed at the end. Sometimes with a voiceover, and sometimes not at all. No one in those days would have considered the thought that some people with too much time on their hands would be trying to build a comprehensive (to the extent possible) listing of tv programs and movies and the actors therein, credited and uncredited. The closest thing at one time was the old “Videolog” yellow pages books that Blockbuster and probably others carried.
Why would Ted Cassidy take a role as a bit player (a.k.a. extra) in a television episode in 1966? As I said in my previous post, he’d already been a star for two years in The Addams Family. Wouldn’t he turn down any part that was that small?
I don’t think it’s Ted Cassidy. It doesn’t resemble him that much except for the extended lower jaw. But a lot of extremely tall people had that extended lower jaw. Even though Ted Cassidy’s son Sean claims that neither Ted nor he suffered from gigantism (I assume he means acromegaly, caused from a pituitary disorder), that’s doubtful, as they look just like they have it, as does everyone else with the disorder (which is usually treated when it becomes apparent nowadays).
I would think all the comedy bits would be sketchy.
So sorry to derail, but this is a good opportunity to share my favorite Ted Cassidy fact:
Cassidy was a radio reporter in Dallas in the early 1960s. One day he heard a commotion outside and went out to investigate. JFK had just been assassinated. Cassidy was among the first to interview key witnesses at the scene, and provided ongoing updates over the air as event unfolded.
mmm
More trivia: His Wikipedia page says that although he pretended to play harpsichord on The Addams Family, “he was an accomplished musician and moonlighted playing an organ for patrons of a Luby’s Cafeteria in Dallas’ Lochwood Shopping Center.[”
The articles about acromegaly and gigantism in Wikipedia seem to say that they are different conditions. A height of 6’ 9" is close to being on the line above which it’s possible to say that a male has gigantism. Most people underestimate the number of very tall people. The tallest person we have good evidence for was 8’ 11.5". I think that before saying that a 6’ 9’’ male has gigantism we should learn how tall other people in his family were
It’s called Gigantism when it begins while they’re still a child. Acromegaly when it begins in adulthood. Same cause - pituitary problems.
You do know that comedian hell is filled with people stealing the same joke over and over.
(but I liked it)
Comedian heaven is filled with those who thought they were first.
The debate ends in a draw.
With regard to Cassidy’s having or not having gigantism or acromegaly, the fact that his son said he didn’t is irrelevant. If something about a person’s medical condition isn’t sourced to a medical professional, the accuracy is sketchy.
And as for why he might have taken the job without credit? Why not? He would certainly have gotten at least scale, and for an actor it can be hard to turn down a paycheck. At that time most of his credits were cartoon voiceovers, and I suspect for most of cartoon history most voice actors weren’t getting any serious coin.
This page at red-skelton.info says that’s a butler but not who plays him. Having Ted Cassidy as a sight gag makes sense.
Could be Richard Kiel. Here he is in a “Wild Wild West” episode, same year.
Color image from something called The Las Vegas Hillbillys, also same year.
James Daris had the chin shadow, though. James in '72:
Too late to add: I think some trickery would have been needed for the significant size difference between 6’2" Red Skelton and 6’5" James Daris.