Data - Star Trek TNG
He's not just a freaking cool android, he's a freaking cool android that loves his kitty.
Hermione Granger - Harry Potter Series
Hermione is bad-ass. There's no other way round it. Clever, intuitive and strong. The first time I ever cheered out loud while reading a book was when she punched Draco Malfoy. What really gets me about her is how resilient she is. All the she goes through with her parents in the latter part of the story to keep them safe, and she never lets on. Quite honestly she makes Harry's stomping, shouting and grumping look like a whiny bitch. And her face right at the end when she says "I'll go with you". Geez.
Giles - Buffy the Vampire Slayer
Every single time it looks like Giles was going to die in that show (which was surprisingly often) I could feel myself pouting at the screen. He is almost too knowledgable to communicate, but he tries his hardest. In his polite, professor-ish sort of way. Every library should have a Giles. Particularly because sometimes he just can't hold himself back...
Neal Caffrey - White Collar
This one sort of surprised me. At first look he's the frustratingly handsome but typically mainstream male protagonist. And then he breaks out all this passion for art and the history surrounding it and I sat back and went "Huh". Then I realised everything he does is part of some well thought out long term plan. This guy has the smarts. So Neal Caffrey is my nomination for secret, hidden nerd.
Charlie Bradbury - Supernatural
Because a) Felicia Day and b) Felicia Day.
Daniel Jackson - Stargate SG-1
With this one comes my confession that terrible sci-fi makes me happy. Deal with it. What I like about this guy is not only does he possess the major smarts, but he is ethically intelligent too. He seems to be the only one in the show that reminds them all that there's more to Earth than America, and that there's more to exploration than technological and military gain.
Penelope Garcia - Criminal Minds
All hail Garcie, Queen of the Geeks. I love her. I am so glad women like her are represented on tv. Her world is bright colours, awesome shiny things and good people. And Doctor Who. I've said it before and I'll say it again; Penelope Garcia is my spirit animal.
Surprised someone wasn't included? Who would you add?