Alex O’Loughlin Alex O’Loughlin

It's time to meet Mama McGarrett!

The first trailer for the new season of Hawaii Five-0 features the long-awaited introduction of Doris McGarrett (Christine Lahti), who was otherwise known as the mysterious "Shelburne" last season. Now that she's back in Steve's (Alex O'Loughlin) life, Wo Fat (Mark Dacascos) will stop at nothing to get to her.

T.I. books retro Hawaii Five-0 guest spot

Lahti won't be the only guest star heading to Hawaii this season. Terrence Howard, T.I., Arielle Kebbel, Robbie Amell, Kendall Jenner and Ving Rhames are all set to make appearances.

Plus: Kono (Grace Park) is mysteriously absent from the new Season 3 scenes in the trailer (but come on, we know they're not going to kill her!) Check out the trailer below:

Hawaii Five-0 surfs up with new episodes on Monday, Sept. 24 at 10/9c on CBS.