7. They've literally saved each other from mortal peril
Everyone on Team Scorpion was furious at Walter for running off on his own at the end of Season 1. Paige and Ralph were about to board a flight out of the city, but when they heard that Walter was dangling off of a cliff they scrambled back to rejoin the team. As the years go on, the team keeps finding themselves in sticky situations—and finding new ways to get each other home safe.