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We came, we saw, we got two interviews with Alexander Calvert, who plays Jack.  
Both Nightsky and Alice had a chance to meet and talk with Alex a bit over the weekend and we cannot say enough nice things about him.  This was his first Comic Con and he admitted to being nervous about the panel and had no idea what to expect.  Based on what we saw, he did a great job!  
Warning! Interviews contain spoilers.
This is Alice's interview with Alex. They have a nice conversation at the beginning. Alex remembered her from their meeting earlier in the weekend.

Here's Nightsky's roundtable interview with Alex: