Team Scorpion is facing a huge problem in tonight’s season finale: they need to save Toby from their old teammate, Mark, who has taken him hostage. We saw at the end of the penultimate episode that Toby had met with a specialized jeweller to get an engagement ring for Happy. Unfortunately, that meeting ended with Mark kidnapping Toby as revenge.
When he has Toby in his clutches, Mark decides to mess with his mind, telling him that Happy will never agree to his proposal once he finds the engagement ring. Meanwhile, he tells the team that he will kill Toby unless his cunning demands are met and he’s happy to torture Toby over the phone with Walter to prove his point.