Hawaii Five-0 will get a visit form another Lost alum during season 5.

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The CBS drama just bumped former Lost actor Jorge Garcia up to a series regular as the conspiracy-minded Jerry Ortega, and now Entertainment Weekly has announced that William Mapother will join the Five-0 crew for at least one season 5 episode.

Mapother, who played Ethan Rom on the ABC mystery, will take on the role of Eric Porter (see video below). A wealthy businessman, Porter will find himself in a tight spot but will decided to aid McGarrett (Alex O'Loughlin) and Co., according to entertainment Weekly.

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Mapother's guest appearance will occur in an untitled episode that is currently filming.

"Report from the Island, 5 Years Later: Jorge just as friendly, Hanauma Bay just as lovely," Mapother tweeted on Tuesday.

The episode in question is only the second one Five-0 has filmed this year, and should air early in season 5.

When Hawaii Five-0 does return from its summer hiatus, the mystery surrounding Wo Fat (Mark Dacascos) and his sudden reappearance will still be hanging in the humid Hawaiian air. McGarrett's long-time nemesis reentered the scene during the season 4 finale, but it remains unknown why he wants to meet up with the man who keeps putting him behind bars.

Hawaii Five-0 returns to CBS on Sept. 26 at 9 p.m. ET.

Tags: Hawaii Five-O television CBS