|When the Light Goes Out, the House Is Dark|
|Season 9, Episode 10|
|Air date||December 7, 2018|
|Written by||Paul Grellong|
|Directed by||Gabriel Beristain|
Truth Comes from the Night
Gone on the Road from which There Is No Returning
After fighting off an assassin in his own home, McGarrett and Joe White flee to Montana to prepare for a battle against those exacting revenge for a past SEAL mission.
- At the end of this episode Joe White sadly passed away.
- Joe White
- Tim Cole
- McGarrett killed 7 people
- Despite being credited, Scott Caan, Taylor Wily, Dennis Chun and Kimee Balmilero do not appear in this episode.
- This episode did mark the final appearance of Terry O'Quinn in this series.
|Steve McGarrett||Alex O'Loughlin||A former Navy SEAL and the leader of the Hawaii Five-0 Task Force.|
|Adam Noshimuri||Ian Anthony Dale||An associate of the H50 team, and Kono's husband.|
|Tani Rey||Meaghan Rath||Former HPD cadet, who was recruited by H50|
|Jerry Ortega||Jorge Garcia||A conspiracy expert and an associate of the H50 team.|
|Junior Reigns||Beulah Koale||Navy SEAL and friend of Steve McGarrett|
|Lou Grover||Chi McBride||Former leader of the HPD SWAT, and newest member of H50.|
|Agent Greer||Rochelle Aytes||CIA Agent, and had a short fling with Steve many years ago.|
|Joe White||Terry O'Quinn||Former Navy SEAL CO, and Steve McGarrett's mentor.|
|Tim Cole||Brad Beyer|
|Mark Howard||Joel Steingold|
|Kasper Bauer||David Agranov|
|Gakuto Kojima||Alvin Ing|
|Wyatt Howard||Alrico Dwayne Perkins Jr.|
|Joanna Howard||Chloe Ryan Corniel|
|Cynthia Howard||Ticondra Swartz|
|Omar Hassan||Christian Rockford|
|Young McGarrett||River Christian|
|Cocoon ♦ The Man Who Fell from the Sky ♦ When the Sea Draws Out the Tidal Wave, the Rocks Where the Cowries Hide Are Exposed ♦ On the Slope of the Cliff, Not One Jutting Rock is Hidden from Sight ♦ Nothing More the Eyes to Search For ♦ Is Borne on the Back; Is Borne in the Arms ♦ The Smoke Seen in the Dream Now Rises ♦ Birds of a Feather... ♦ Truth Comes from the Night ♦ When the Light Goes Out, the House Is Dark ♦ Gone on the Road from which There Is No Returning ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA ♦ TBA|