Mark Hamill made a career for himself playing Luke Skywalker in the 'Star Wars' franchise, but he's since made his career doing just about everything else, including playing quite a few anti-Skywalker bad guys ("I love Luke, don't get me wrong," he said with a laugh).

When the 'Chuck' cast announced at Comic-Con that Hamill was the latest awesome guest star popping by the show to play villain for their final season (premieres Fri., Oct. 21, 8PM ET on NBC), the crowds geeked out as their universes collided.

But we knew very little about the bad guy he's playing ... until now. I caught up with Hamill to hear all about his James Bond-style cameo (including some details he probably shouldn't have mentioned -- mild spoilers ahead!) and whether or not he'll be returning for more than just "one scene."

He also talked about his voice work as The Joker, first in animation and now in hit video games Arkham Asylum and the upcoming Arkham City. I even got him to say a line in the Joker's voice -- don't you kind of wish this was a video interview?

Keep reading for more 'Chuck' talk and bad guy banter with the one and only Mark Hamill.