Who was behind a ransomware attack that took out the entire power grid for west Los Angeles?
That was the big question on NCIS: Los Angeles Season 9 Episode 11 when everyone realized they were in for one of the biggest cases of their careers.
Meanwhile, Sam struggled to come to terms with the fact he would have to spend his first Christmas without his wife, and he went on a downward spiral.
Did the family rally to help him get through it?
Use the video above to watch NCIS: Los Angeles online right here via TV Fanatic.
Get caught up now.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.