Butt-Kicking TV Characters

Which of these top-notch fighters, who have appeared in TV series that have premiered in 2005 or later, would YOU most want to have beside you in a dark alley?

After voting, discuss here.

(Characters who possess "superpowers", "magic" or any kind of unrealistically advanced technology do not qualify for this poll.)

Special thanks to Jen, Nikolay and Jose for their contributions to this list.