The upcoming seventh season of Dexter sees the Miami serial killer busted by his own sister, Comic-Con fans learned today. A brief look (see below) at the opening minutes of the upcoming Showtime series’ next-to-last season showed Dexter Morgan caught by his homicide detective foster sibling Debra (Jennifer Carpenter) as he cuts up the series’ Travis character. After trying to talk his way out of the situation, the forensic analyst finally seems to lose his cool when Debra goes to call in the incident. That’s when the screen went black and the crowd went wild. Otherwise, despite a lengthy Q&A from adoring fans, cast members Michael C. Hall, Carpenter, and executive producer Scott Buck kept pretty quiet about what the new season will bring. What was not quiet was that Yvonne Strahovski, the former Chuck co-star, would be joining the show this year as Hanna. Described by the actress, who was also on the panel, as “a woman of mystery who meets Dexter and helps him with an old murder investigation,” the Hanna character seemed to be a pivotal figure in the season. “I can’t say more, there are lots of things I’m not allowed to say or I’ll get in trouble,” said Strahovski. She did say that while she had only been filming on Dexter for a few days she already liked it more than her former show. “Dexter’s better,” Strahovski said to big applause. Earlier the packed ballroom was shown scenes from a Dexter video game and a new episode from the new season of the animated Dexter prequel web series Final Cuts. Here’s that footage:

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