Gem was having a semi mental breakdown. 

He could've sworn he saw Chris Argent outside beside his car. 

But wasn't Chris in Beacon Hills, retired?

12 HOURS EARLIER 

Derek and Isaac then realized that it wasn't just Peter Hale but Chris Argent was right behind him. It was no secret that the two were getting closer these past 2 years. 

But them working together? They've never saw that or heard about it. 

"I asked a question, answer it." Peter demanded as he sat down on the old leather couch. Chris just stood by the couch. 

"Yes. What do you know about them?" Derek finally answered as he looked at the two older males. 

"The pack is kinda makeshift, like yours. The pack leader is Dominic Toretto, and he is someone you don't want to mess with. He'll kill you over his family. Second-in-command of the pack is his son, Gemini Toretto, but he left the pack a few years back, so that would make Vince the new second-in-command, Vince is someone you definitely don't want to mess with, he is very territorial. Next are the pack members, Letty, Mia, Jesse, and Leon. They are harmless unless you mess with them or someone close to them. Also they are well-known street racers." Peter said, as he proped his feet up on the coffee table. 

"What do you know about Gemini?" Derek asked, as he looked at his uncle. 

"Gemini was born a beta and spark, but then he killed someone on his 7th birthday,after being chases through the woods by hunters, he became a omega. Somehow his spark grew stronger after he became an omega. It's said that he started racing under the name Spark Plug after he left LA. That's all I know about Gemini." Peter said, as he looked at the two wolves in front of him. 

"The Toretto pack called Stiles Gemini." Isaac finally said, as he looked at the older males. Peter didn't looked surprised and neither did Chris. 

"So you finally found out?" Chris asked as he looked at the two, "I was asked personally by Dominic Toretto to make sure his son stayed safe." 

"You both knew?" Derek asked, as he looked at them with red and angry eyes. 

"Do you want us to look into where he went back to LA?" Chris asked, as he looked at the alpha standing in front of him, minutes from changing because of anger. 

"Yes!" Derek growled out, as he kept flashing his red eyes. 

And that's how Chris Argent and Peter Hale ended up coming to LA, to see why Gemini decided to come back home, so yes, Gem was not having a mental breakdown, he really saw Chris Argent outside at his car, checking the tires.