B is for Brian & Boyle ('Limitless'), Bruce & Barbara & Butch ('Gotham'), and Bellamy ('The 100')
First off, my current favorite show has two major characters who have names beginning with B! If you haven't seen Limitless, I think of it as a cross between Psych and the Limitless movie (Bradley Cooper even shows up in a few episodes as Eddie Morra). The reason I also compare it with Psych is because it has a similar level of 80s-style humor, which is my favorite. Anyway, the best character of the best show on TV right now is Brian Finch (portrayed by Jake McDorman). His character was a loser much like the Eddie Morra character in the movie, then becomes awesomely intelligent when he takes the drug AZT. In this case, Brian is not quite as amazing as Eddie, and winds up under his thumb. He's also forced to work for the FBI. Speaking of the FBI, Agent Spellman Boyle (portrayed by Hill Harper) is the next B character. He's just you're average run-of-the-mill TV FBI agent, but he clashes with Brian in sometimes hilarious ways.
Now for a few Gotham characters: Bruce Wayne (portrayed by David Mazouz) is Batman. Well, not yet. But this is who it's all about, right? On this show, he's just a kid, but probably the most fascinating and well-acted young character you'll ever see on TV. Barbara Kean (portrayed by Erin Richards) used to be Gordon's annoying fiancee, but now she's hilariously batty. Butch Gilzean (portrayed by Drew Powell) is a mob enforcer, but Penguin managed to turn him into his slave for a while, which was quite amusing. Finally, we've got The 100. Bellamy Blake (portrayed by Bob Morley) was a bad guy, then became a good guy, and now he's one of the worst characters on the show. Get a clue, Bellamy!