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10) Christopher Lloyd
If you're going to get Christopher Lloyd to be on your TV show, shouldn't you have him play a flashier role than that of Chuck's psychiatrist? Maybe have him researching time travel for Fulcrum, like Doc Brown in Back to the Future? Or threatening John Casey's offspring while demanding a secret weapon, like Commander Kruge in Star Trek III? Still, getting the Addams Family star to appear in a Season 3 episode was a great coup for Chuck, and for Who Framed Roger Rabbit? fans everywhere. ("Chuck vs. the Tooth")
9) Robert Englund
Who better to play a maker of nightmares than an actor who is most famous for inspiring them? Freddy Krueger himself, actor Robert Englund, came on board for one Season 4 episode as a Volkoff scientist who developed a fear toxin that was incredibly similar to what the Scarecrow uses in the Batman comics. Englund has played a scientist before -- see Never Too Young to Die, for starters -- but this is definitely better than having him play a cutesy alien, like he did in the original V. ("Chuck vs. the Aisle of Terror")
8) Mark Sheppard
The evil spy network known as the Ring has been a thorn in the side of Team Bartowski since the beginning (via its Fulcrum division), so when it came time to show the leader of The Ring in Season 3, there was only one answer: Mark Sheppard. After playing increasingly smart, evil and/or manipulative characters in such shows as Firefly, Battlestar Galactica, Warehouse 13 and Supernatural, he had established himself as the Big Bad of... well, pretty much everything, making him perfect to head up the shadowy organization that made Chuck's life so interesting. If Mark Sheppard isn't Nerd Satan, he's at least Nerd Loki. ("Chuck vs. the American Hero")
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Andy Richter and Jenny McCarthy may have hogged the spotlight in the second-season episode where Chuck and Sarah infiltrated a Fulcrum-controlled suburban housing development, but it was Thompson, playing an Interesect-developing agent, who took center stage in the eyes of the show's geek viewers. The man played iconic villains on The X-Files, Buffy and Hercules, and was the main bad guy in Doctor Mordrid, the hastily retitled Doctor Strange movie from 1986. And did we mention he's appeared in three Star Trek TV series and one movie, playing five different aliens -- two of them Klingons? He's KIND of a badass. ("Chuck vs. the Suburbs")
6) Robert Picardo
While most would agree that Picardo's long run as The Doctor on Star Trek Voyager was what elevated him to sci-fi royalty, the man has been appearing in genre fare since the early '80s, and his appearances in Innerspace, Gremlins 2 and Total Recall would make him a geek icon even without it. (Well, to me, anyway -- the man was the voice and face of the Johnnycab, for crying out loud.) So it was a big shout-out to the nerds when Picardo was cast as Dr. Howard Busgang, co-creator of the Intersect program, in Season 2. ("Chuck vs. the Lethal Weapon")







