It will be a Lost reunion on Hawaii Five-0 next season.  Henry Ian Cusick will make a guest appearance on the show where his former co-star Daniel Dae Kim is a series regular.

According to TVLine, Cusick, who co-stars in the CW’s new series The 100, will appear in the Hawaii Five-0 Season 4 premiere as a member of a terrorist group named National Liberation Movement.  Another former Lost star, Jorge Garcia, will also be making a guest appearance in season 4. Tania Raymonde and Reiko Aylesworth have also made guest appearance on Hawaii Five-0.

In addition to these guest appearances, Terry O’Quinn, who played Locke on Lost had a recurring role in Hawaii Five-0 season 2.  Quinn played Joe White, former commanding officer for main character Steve McGarrett (Alex O’Loughlin).

CBS announced Cusick’s casting in a tweet saying, “#H50 Casting News: Feeling LOST? Look who’s back on an island @hicusick joins @danieldaekim @OQuinnTerry @jorgegarcia”.

Cusik then tweeted, “Hermanos! @danieldaekim #H50”,  along with the picture below.

Hawaii Five-0 moves to Fridays this fall beginning Friday, September 27 at 9 p.m. ET.