Hawaii Five-0 season 6 finale is about to go nuclear.

'Hawaii Five-0' Season 5 Finale Scoop: Gabriel Waincroft Returns, Kono & Adam Face Wedding Problems

The CBS drama will conclude the current season with back-toback episodes, the second of which will bring back Cathrine Rollins (Michelle Borth) as McGarrett's (Alex O'Loughlin) team races to stop a "patriot" from igniting a new war on terror.

"On the eve of Kono's (Grace Park) wedding to Adam (Ian Anthony Dale), Five-0 must stop a fanatical patriot intent on starting a new war on terror by detonating stolen nuclear warheads and framing a terrorist leader," CBS teased in regards to "A Make Kaua (Until We Die)."

'Hawaii Five-0' Season 5: Catherine Rollins Returns [PHOTOS], Michelle Borth Back On Set

"A Make Kaua" will be preceded by a little drama on the home front. Danny (Scott Caan) and Kono will both receive some shocking news regarding their respective ex-wives and fiancées during "Luapo'i (Prey)," part of which will deal with Adam's alleged lingering connections to the Yakuza.

Although the episodes will air on the same night, May 8, executive producer Peter Lenkov assures viewers that it will not be one long story. Instead, the events of "Luapo'I" and "A Make Kaua" will take place a week apart.

Find out more when Hawaii Five-0 airs Fridays at 9 p.m. ET on CBS. Click the video below to see a preview for the series' latest episode, "Ua Helele'i Ka Hoku."

Tags: Hawaii Five-O television CBS