On Scorpion Season 3 Episode 11, Team Scorpion takes a trip for Christmas. They head up to a cabin in the woods, and they are going technology free for Christmas. This way, they can't get buzzed for a case. Plus, there's no cell service up there.
As Tim and Walter search for the perfect Christmas tree, they stumble across a guy that's about to be murdered. His name is Sam Roberts, and he's with ATF, and during his getaway, he gets shot.
Thanks to Toby's quest for a perfect Christmas for Happy, which includes a roaring fireplace, the bad guys could see where Sam and Team Scorpion were held up. So much for hiding from the bad guys.
Team Scorpion must defend the cabin from intruders, so they channel the ultimate Christmas hero - Kevin McCallister. Boy, do they make him proud. The intruders barely get two steps into the door before they are knocked out.
Now that all the bad guys have been taken care of, it's time for things to go terrible awry. Sam is not really an undercover ATF agent. He's one of the gun runners, and he kidnaps Ralph for some reason.
Don't worry, Team Scorpion saves the day, and Ralph makes it home safe and sound.
Walter and Tim have a heated argument after Walter gives his, not at all anti-Tim, Christmas gifts. After a chat with Toby, Paige tells Tim to take the job he was offered. It's a leadership position, which is something he will never really get if he stays with Scorpion.