Hawaii Five-0's Danny Williams will be particularly protective of his partner when season 6 opens.

'Hawaii Five-0' Season 6: McGarrett & Danno In Hot Pursuit, New Car Chase VIDEO From Set

Danno (Scott Caan) and Steve McGarrett (Alex O'Loughlin) will start their sixth year working together just hours after Oahu's near nuclear disaster, and something will prompt the detective to become even more conscious of the former Navy SEAL's well being.

"I can't get into specifics, but I have it on good authority that there are some very sweet and 'bromantic' moments on tap for Season 6, especially in the first three episodes," TV Line's Matt Mitcovich reported. "Danny is very much going to have McGarrett's back, I hear, maybe even being a bit protective of his partner in crimesolving."

'Hawaii Five-0' Season 6: Catherine Rollins Gone By Episode 3? Showrunner Teases McRollins' Future

While we expect Danno to have a few words of caution in regards to the whole McGarrett/Catherine situation - Rollins (Michelle Borth) did break Steve's heart once already, even if her intentions were noble - but it remains to be seen what case will have Danny throwing up his defenses.

Hawaii Five-0's season 6 premiere will open with a good old fashion x-marks-the-spot pirate mystery, which will kick off in the 1800s before viewers catch up with Kono (Grace Park) and Adam's (Ian Anthony Dale) wedding party.

Find out more when Hawaii Five-0 returns to CBS on Sept. 25 at 9 p.m. ET.