The Scorpion team races to find who used a genetically targeted virus on four children, one of whom is the daughter of the governor. This case strikes close to home for Walter and Agent Gallo.
After Team Scorpion fails a military training mission, they are determined to prove their worth to Cabe and Homeland Security when a bomber threatens to take out the internet infrastructure of the entire Southwest.
Scorpion asks a music artist for help after he creates an algorithm that can produce popular songs and may find the killer of a music blogger; Drew asks Walter to help find a way to make a connection with his son.
Sylvester is seriously injured when he accidentally triggers an explosive device during an investigation, and Team Scorpion searches for who is responsible.
A 10-year-old boy is trapped in a rockslide/sinkhole near the beach. The team must find a way to rescue him before the rising tide fills it up with water.