2. Alternate Olivia Dunham, Fringe

There is so much to say about Anna Torv. When she first began portraying Olivia Dunham with the start of Fringe back in 2008, critics criticized her as being weak. Olivia was stiff, and a character that hard to empathize with. But, as the first season progressed, Torv began breaking down the character's walls as the character was confronted by more and more eccentric occurrences, and grew closer and closer to Peter and Walter, her teammates. Torv's acting was nothing to write home about, but she was definitely much more watchable by the time the second season rolled around.

And then, with the season two finale, everything about Torv's acting changed. That's because Torv found herself playing not one, but two different characters -- and that's when her acting really started to shine, along with the prowess of the show's writers.

Torv found herself playing both the original Olivia Dunham as well as the alternate universe's incarnation of Olivia, who served as the main villain for the first half of season three. But there's something interesting Torv did with the role, and something interesting the writers did with the role: they made her likable. "Altlivia" is supposed to be a bad guy, and she's actively working against our heroes. She's responsible for our Olivia's imprisonment on the other side, and she also took over Olivia's role in this universe. But instead of being a black-and-white character, who is entirely bad, we've started to see signs that Altlivia isn't entirely bad. She's doing what she thinks is right, and while her morals may be questionable, she certainly isn't heartless. We can't trust her, but we can certainly like her. We haven't seen her since "Entrada," but we can only hope she'll be coming back sooner rather than later.

1. The Eleventh Doctor, Amy Pond, and Rory Williams: The 3 New Leads of Doctor Who

There is no cast as infectiously great as the three new leads of Doctor Who. Watching them together on screen, you can see the chemistry just flowing between them. It's like they're old pros who have known each other forever. And, within the context of the show, it's true -- Rory and Amy are now technically thousands of years old -- older even than the centuries-old Doctor. But the truth is, they've only just begun -- the Eleventh incarnation of the Doctor made his very brief debut on January 1, 2010, while Amy Pond and Rory Williams made their debuts in the next episode on April 3, 2010. It's weird, though -- it feels like we've known them forever.

And that's part of the brilliance of what Steven Moffat and the rest of Doctor Who's writing staff have done: they've created three extraordinarily likable new leads for a show that's been running for almost fifty years. It's the most drastic change the show has made since its reboot in 2005 -- only one character has overlapped from any previous episodes (and even then, River Song only appeared in two episodes back in 2008). And, instead of being jarring, it simply works. Smith is undeniably great as the new Doctor, and is well on his way to contesting his predecessor David Tennant for the best portrayal of the role. The tarty Amy Pond is lovably feisty, and her much put-upon husband Rory is equally funny, despite playing the role of comedic "straight man" of the group.

Arthur Darvill, who portrays Rory, was only promoted to a series regular with the most recent Christmas special. The upcoming series of Who, which is slated to begin in March, should be chock full of the dynamic we only got glimpses of through episodes like "The Vampires of Venice" and "Amy's Choice." And, of course, Amy and the Doctor will be returning. But as we know too well, the cast of Doctor Who is a rather amorphous bunch -- the Doctor has, after all, gone through eight companions in the past five years -- the show's even been through three Doctors! But it's undeniable: we'll be enjoying the current trio for as long as Moffat allows us to.