While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak.
Bob is held hostage by a drug cartel after he poses as a chemist who can turn cocaine into paint for easy smuggling. Meanwhile, Mack penetrates the group posing as a prize fighter in an illegal betting ring to help bring them down.
When Deeks is shot during a robbery, the team must determine if he was the intended target.
Zo'or (Anita La Selva) threatens to attack Earth after an artifact containing the secret of synthetic core energy is stolen from the Taelon Mothership.
The cyber team investigates the abductions of young women whose social network pages are being kept up to date. Also, Ryan helps Trish McCarthy (Rosanna Arquette) cope with the death of Trish's sister, Ryan's former psych patient.