...Roger C Carmel had already shown himself to be TV's most proficent practictioner of evil, with multiple appearances on various series, including a record-setting run as Classic Star Trek's only repeat antagonist!
But his greatest role had yet to be played!
And it would be in a historic setting...the first crossover between super-heroes from two different comic companies!
In the Batman second season two-parter "A Piece of the Action" / "Batman's Satisfaction", Carmel played Colonel Gumm, a counterfeiter using his employer, Pinky Pinkston's stamp-printing facilities to produce forgeries of rare stamps he sells to collectors as the real thing!
It's also implied he had something to do with the demise of his employer's father, Pincus Pinkston, but that's never made clear.
When The Green Hornet (who is believed to be a criminal, though he's actually a hero) shows up demanding a cut of the counterfeiting operation, Gotham's own Caped Crusaders leap into action...to try to arrest The Green Hornet!
However, while tailing the Hornet, they discover Gumm is really the baddie!
When the Callous Counterfeiter appears to have turned the Hornet and his aide, Kato, into life-size stamps, Batman and Robin attack, but are caught like flies on flypaper as the first episode ends with them also about to be processed into oversize postage stamps!
As is the case with such cliffhangers, Batman and Robin break loose and free the Hornet and Kato who, or course, weren't turned into giant stamps!
Gumm and his men escape, and, without evidence, the Dynamic Duo let Kato and the Hornet walk.
Figuring out the Colonel's next move, both duos go to a major stamp exhibition where the Gumm and his gang (in disguise) are about to make off with oodles of rare stamps when both teams of crimefighters take them down while battling each other (since B&R think GH&K are criminals, remember?)!
Roger plays Gumm as someone who really enjoys being evil, going almost as all-out wacky as Victor Buono did as King Tut!
He gloats and preens, all but devouring the scenery and spitting out toothpicks in an overacting tour-de-force!
But that's not all!
Carmel gets to play not only Gumm, but Gumm in three different disguises...all with different accents!
...as an unnamed British gent who eavesdrops on Pinky Pinkston's lunch with Bruce (Batman) Wayne and Britt (Green Hornet) Reid who then pay a visit to the stamp shop of...
...the Russian-accented "Boris Sevaroff" whom Bruce questions about counterfeit stamps.
When The Green Hornet invades Gumm's lair later that night, he reveals he knows Gumm is Sevaroff, leading the Colonel to conclude The Green Hornet is really...wait for it...Bruce Wayne!
Finally, Gumm appears as "Senor Barbossa", an Argentinian stamp dealer, in order to steal rare stamps at the stamp exhibition.
Despite being a one-shot villain, Colonel Gumm was fondly-remembered by Bat-fans, and, a couple of years ago, when a comic based on the TV version of the Caped Crusader, Batman '66, was finally produced, he was brought back for a sequel to the TV series episodes...with a promotion from "Colonel" to "General Gumm"!
But there was a major problem!
The comic's publishers didn't have the rights to use Roger's likeness!
So, the story's writers concocted Gumm having an accident while trying to improve his glue, resulting in a sheet of it permanently affixed to his face!
Despite that drawback, the script captures the character's speech patterns perfectly, and you can "hear" Roger's voice in your head as you read the story!
Will Gumm return again?
Only time will tell!
At any rate, between Colonel Gumm and Harry Mudd,
Roger C Carmel's position as
The Most Dangerous Man on TV
is assured!
BTW, this is part of the...