Sarah Connor season finale will wrap things up ... sort of

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Dec 14, 2012, 3:54 PM EST

Josh Friedman, executive producer of Fox's Terminator: The Sarah Connor Chronicles, told reporters at WonderCon on Sunday that he's already shot the season finale of the series, though there's no word on whether the show will be picked up for a third season, and that the finale will wrap things up but leave room for more.

"It requires a very, very skillful hand," said Friedman in a group interview, adding that he himself wrote the finale. He added: "I think it's a finale. It feels like a finale, doesn't it?"

"Either way, I'd be doing a disservice if I didn't try to write something. I mean, I'm an optimistic guy, and all I can try to do is write for success, you know?" Friedman added. "[If] the show doesn't come back, people are going to be upset regardless of what that episode looks like. ... All I can say is the episode answers a lot of the questions that people have been asking for the last 30 episodes. So, I mean, and it asks some new ones, but I can't, you know, that's just me. So, but I think a lot of that stuff that people have been wondering about, we will solve."

Speaking separately, Shirley Manson, who plays the liquid-metal Terminator Catherine Weaver, added that the season will definitely wrap up her character's story arc.

For her part, Summer Glau, who plays the cyborg Cameron, added that the show will provide some kind of closure for her character as well.

"At the beginning of the second season the thing in Cameron's life was that she was damaged," Glau said, referring to the chip in Cameron's head. "She had been damaged, and then that threw her off her game. And I think if my character was experiencing anything, it might have been insecurity about whether or not she was capable of doing her best at protecting John [Thomas Dekker] anymore. And I think she was really struggling with the insecurity of having a new girl in John's life, Riley [Leven Rambin]. ... And I think that that's all going to come to a head toward the end of the back nine [episodes], and then in the finale something, there's just a huge, huge change/resolution/change." Terminator: The Sarah Connor Chronicles airs Fridays at 8 p.m. ET/PT.