Don't expect Gabriel (Christopher Sean) to stay dormant for long on Hawaii Five-0.

We haven't heard much from the show's big bad since Adam (Ian Anthony Dale) was forced to torture (and eventually witness the murder of) his partner Aaron in Episode 4. But it won't be long before Gabriel tries to exact his revenge - and causes some major problems for Adam and Kono (Grace Park) in the process.

According to showrunner Peter Lenkov, Episode 10 (the last one to air before the show's holiday hiatus) will feature a "big turn" in the Gabriel/Adam storyline. "It's definitely going to affect Kono and Adam's relationship," Lenkov says. "That threat is not going away. ... He's definitely a big presence in their lives and everybody else's."

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And the ripple effects will be long-lasting. The story takes another major turn in the batch of episodes that will air after the new year, Lenkov teases. We're guessing that somewhere along the way, Kono is going to learn what really happened on the day Adam was supposed to just be in physical therapy. "Her story's going to be different than everybody else's, because her story has been affected at least since the beginning of the season," Lenkov notes.

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