Here's the official guide and promotional photos of Hawaii Five-0 season 3 episode 20 "Olelo Pa’a". This episode airs on Monday, April 15 on CBS. According to the press release, this episode serves as a prequel to the series' pilot.
(*Olelo Pa’a is Hawaiian for “The Promise”)
WHEN McGARRETT AND CATHERINE CROSS INTO NORTH KOREA TO RETRIEVE THE REMAINS OF A FALLEN FRIEND, HE RECOUNTS HIS LAST DEADLY MISSION THERE --
Jimmy Buffett Returns as Frank Bama and Terry O’Quinn Returns as Joe White
- When McGarrett and Catherine cross into North Korea to retrieve the remains of a fallen friend, he recounts his last deadly mission there.