First Look: McGarrett's Special Mission On Hawaii Five-0

Five-0 investigates a scuba diver's death from a gun recently used in another murder and McGarrett prepares to propose to Catherine on "Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3).
Alex O'Loughlin as Steve McGarrett

Alex O'Loughlin as Steve McGarrett

"Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3)
Grace Park as Kono Kalakaua and Alex O'Loughlin as Steve McGarrett

Grace Park as Kono Kalakaua and Alex O'Loughlin as Steve McGarrett

"Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3)
Scott Caan as Danny

Scott Caan as Danny "Danno" Williams and Alex O'Loughlin as Steve McGarrett

"Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3)
Filming

Filming "Ua 'o'oloku ke anu i na mauna"

"Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3)
Scott Caan as Danny

Scott Caan as Danny "Danno" Williams and Alex O'Loughlin as Steve McGarrett

"Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3)
Alex O'Loughlin as Steve McGarrett

Alex O'Loughlin as Steve McGarrett

"Ua 'o'oloku ke anu i na mauna (The chilling storm is on the mountains)" (Season 6, Episode 3)