Michelle Borth, Alex O'Loughlin Photo

From: Photo Flash: First Look - HAWAII FIVE-0's 'Olelo Pa'a,' Airing 4/15

On HAWAII FIVE-0's upcoming episode, titled 'Olelo Pa'a,' when McGarrett and Catherine cross into North Korea to retrieve The Remains of a fallen friend, he recounts his last deadly mission there, on Monday, April 15 (10:00-11:00 PM, ET/PT) on the CBS Television Network. The episode serves as a prequel to the series' pilot. Jimmy Buffett returns as Frank Bama and Terry O'Quinn returns as Joe White.