We always knew it was in him, but we weren't sure we'd ever see it. Until last night.

Chuck Bartowski finally became a killer, shooting Shaw to death in order to defend Sarah. The fallout from that act?

"It's a big thing for him," Chris Fedak told TV Guide. "But... It's not morally ambiguous; he's saving Sarah's life. He knows there will be ramifications in his relationship with Sarah. This season has been about what Sarah thinks about Chuck becoming a spy and how it will change him. It's such a huge moment: To save her life he has to kill someone, and in doing so, will she still love him?"

As for how this decision will affect Chuck going forward? A few more excerpts from the interview:

On Christopher Lloyd guest-starring as a therapist: "That's an important part of it, but just one of Chuck's many issues. Chuck is an emotional guy and he probably should've gotten a therapist many years ago."

On the season finale: "As we head into the [it], we'll realize there's so much more going on in Chuck's life that's going to affect his decision. Chuck wants to be a spy and everything he's doing is to become this super agent, but we're never going to lose sight of the fact that he's also a good guy at heart. It's the Chuck Bartowski show. He's not James Bond; he's not Jack Bauer."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.