11. The Old College Try

As the team deals with Megan's death six weeks later, they must stop a cyber terrorist, using code written by college students, who is threatening to shut down the Federal Reserve if they do not receive a quarter of a billion bitcoin in the next 72 hours. For their mission, they have to go undercover at a local university; Happy goes as a sorority pledge, Walter as a visiting drama instructor, Sylvester as a wrestling transfer student, Cabe as a campus security guard, and Toby a professor applying for a position in the Psychology Department headed by a former rival who stole his fiancée.

But, in order to foil this unknown hacker, they must get into the school's server, which is a highly sophisticated quantum computer, to kill the ransomware. Meanwhile, Walter conducts an experiment to prove that Ray's firefighting partner's death was not Ray's fault by using Tuggle's tank that Cabe's friend acquired from police evidence storage. Later, Ray discovers the submerged tank in liquid glycerin which would harden any air leakage from the tank to create a bubble pattern. The test proves the tank was defective, giving Ray the peace of mind to go back into the world again, leaving Scorpion headquarters.