FBI-agent Don Eppes (Rob Morrow) har et hemmelig våpen i sin yngre bror, Charlie (David Krumholtz), et mattegeni som bruker ligninger til å løse forbrytelser.
Don and his team investigate a trail of illegal waste disposal after a sinkhole, which collapses in a school playground, kills an elderly woman and injures several children. Kathy Najimy joins the cast in a recurring role as Charlie's new boss.
S3E309 41 min
