The first pictures from the premiere of Season 4 of Hawaii Five-O have been released and details about Chin Ho's past will also be revealed in this season, TVGuide reports.

Judging by the pictures and recent reports it seems like Chin Ho will be one of the main focuses of Season 4. We will find out more about the State Police Officer's, who is played by Daniel Dae Kim, past via flashbacks. It was revealed that one of the upcoming episodes will rewind to the time when Chin met his late wife for the first time. Chin's story arc will also delve into the circumstances surrounding the loss of his badge and get into his relationship with Steve McGarrett's father, John, who was a mentor to Chin.

The first few episodes of Season 4 will reunite Chung with Lost alum, Henry Ian Cusick and Jorge Garcia. Cusick will appear in the premiere as Ernesto, a member of a terrorist group named National Liberation Movement. "He's tied in to some baddies we introduced last season," executive producer Peter Lenkov told TVGuide.

Garcia, will be coming on board in episode three, to portray the character of a brilliant conspiracy theorist. Garcia will be sharing scenes with Kim. "He's going to be sort of the fifth member of Five-0," Lenkov said of Garcia's charcter. "Jerry still lives in his mom's basement. He's the boy who cried wolf whom nobody ever believed, but he finally gets validated."

Kim also suggested that Lost fans should watch out for an inside-joke to do with island life. Kim recently put up a picture of him and co-star Masi Oka on Twitter, on Sept. 2.

Melanie Griffith to Play Dano's Mom in Hawaii Five-O

Season 4 will include a number of other guest stars, such as Melanie Griffith and Nick Jonas. Griffith will be playing the role of Detective Danny "Danno" Williams' (Scott Caan) mother. Other guest stars include Rumer Willis, Terry O'Quinn, Carol Burnett, and Rebecca DeMornay.

Season 4 premieres on CBS on Friday, Sept. 27.

Watch the promo for Season 5 of Hawaii Five-O here: