Hawaii Five-0's Gabriel Waincroft is only just getting started.

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If you thought shooting Adam (Ian Anthony Dale) and torturing Kono (Grace Park) was Gabriel (Christopher Sean) at his worst, you should think again. The fugitive left a sting of bodies in his wake during season 5, and paradise's newest big bad will only up his game as season 6 wears on.

"He is really going to leave some scorched-earth this season with some of the stuff is going to do," showrunner Peter Lenkov warned, according to TV Fanatic. "I think some of the stuff he does in the first episode is pretty tame compared to what is going to do later on in the season."

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Well, that's slightly terrifying.

Steve McGarrett (Alex O'Loughlin) and Co. haven't faced a treat like Gabriel since Wo Fat. While McGarrett eventually managed to defeat his nemesis, Gabriel will be on a whole other level.

"With Wo Fat there was an emotional component that drove him. He was driven emotionally even though he's very cold and calculating and played everything like a businessman," Lenkov explained. "I think the difference with Gabriel is that the guy's a sociopath. He'll do whatever it takes to get to the place he wants to be at."

It's safe to say he's certainly screwed up Adam and Kono's lives. Should Adam pull through, the Yakuza will be ready to reign fire on the couple. After experiencing the glamour of life on the run back in season 4, it's definitely not something the newlyweds are looking forward to trying once more.

Find out what sinister plans Gabriel has up his sleeves when Hawaii Five-0 airs Fridays at 9 p.m. ET on CBS. Click the video below to see a preview for the series' next episode.

Tags: Hawaii Five-O television CBS