How many examples can we come up with of the old ‘exact mirror image doubles’? They can be clones, alternate universe copies, seperated at birth twins, whatever. But - one good, one evil. How many times has this occurred?
Some examples:
Good Kirk/Evil Kirk (and Spocks, Uhuras, Kiras, Tuvoks, etc. on various incarnations of “Trek.”)
Samantha/Serena (“Bewitched”)
Genie/Evil Genie (“I Dream of Genie”)
the Time-Lord Doctor / human Doctor (last episode of the most recent “Doctor Who” series)
Good Dr. Marlena Evans/Evil Samatha Evans on Days of Our Lives. An oddity in that they were played by real life identical twins Deidre and Andrea Hall.
On Friends they confused Joey’s crazy stalker fan who was in love with Dr. Drake Remore by presenting Joey as his evil twin.
Not exactly good/evil, but identical cousins Patty and Cathy Lane (and later a third identical cousin) on the Patty Duke Show.
In the old Adventures of Superman Boulder, a common thug, underwent plastic surgery to look just like Superman. Not to be outdone, Jimmy Olsen was kidnapped by Kid Collins, his identical duplicate.
The gold standard: KITT and his evil vehicular twin KARR. (I was going to mention Garthe Knight, but he’s Michael’s eevil younger brother ; not his twin).
And there was an episode in which Xander gets separated into two versions. Though neither was evil–it was more like Decisive Xander/Shlub Xander. Played by real identical twins Nicholas and Kelly Brendon.
“Played” is probably a little generous to Kelly. Nicky did all the actual acting of both characters, Kelly was used in a few shots where both appeared, but did no dialogue. He was more like a really cheap special effect.
Actually, that’s Nicholas Brendon and Kelly Donovan. They use their first and middle names, not their last (Schulz, I think), for credit.
Stargate and Stargate Atlantis have both had parallel universe versions of characters, not to mention Replicator versions or clones or whatever else they’ve done. (I’ve sort of lost track; it’s like trying to remember how many times Daniel Jackson has died.)
Farscape has two John Crichtons for awhile. Earlier, there’d been Caveman Crichton and Future Super Brainy Crichton, due to an alien egg thing, I think it was.
Crap, sorry. I looked and I thought I was in the clear, but I missed yours. I’d argue that Garthe and Michael still count, though; the OP asks for actual twins and twinlike pairs (clones, alternate universe copies, etc.) and they definitely match the archetype. Garthe has a classic case of non-sibling rivalry. Technically, KITT and KARR aren’t biologically related, either.
