'Hawaii Five-O's' Alex O'Loughlin: Book 'Em, Danno!

It's been 42 years since "Hawaii Five-O" first premiered in 1968 -- it lasted 12 seasons -- and tonight the cop drama in luau land returns with star Alex O'Loughlin, who stopped by The Grove to tell "Extra's" Lauren Sanchez all about it.

"I think it's much less stylized and sort of postured," O'Loughlin said of the remake. "Now we're going for realism."

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Starring as detective Steve McGarrett, Alex says he's most excited about the relationship between Scott Caan's character, Danny "Danno" Williams, and his character. "That's the central relationship throughout the show," he said.

See candid celebrity photos from The Grove

If you need more of a reason to watch, Lauren asked the Aussie hunk if he was shirtless a lot, to which he replied, "Man, I'm like almost naked in the first episode!"

Catch "Hawaii Five-O" at 10:00 PM tonight on CBS.