A grad student goes missing, Andy and Nick's search reveals the young woman was leading a double life as a high-end escort the police discover that another escort also went missing a month ago, a pattern begins to emerge.
Nick and Oliver embarrass 15 Division when they're surprised by a pair of gunmen and end up losing the key witness in an upcoming mob trial with no leads, all hope seems lost for the police until a man comes in off the street with vital information.
A silent alarm leads Andy and Swarek to the discovery of an illegal warehouse party and to an injured John Doe a homeless squatter who has been the victim of a brutal stabbing 15 division works to contain the teenagers to the scene for questioning.
A nefarious virus is uploaded to Walter's computer, turning the team's new "smart" building project into a death trap with people locked inside.
When Walter finally learns Cabe's secret about the Baghdad mission, the future of the team is threatened Ralph puts his life in jeopardy to help the team.
The team protects a witness who is on her way to testify against a dangerous drug cartel -- while the cartel is in hot pursuit.
As the members of team Scorpion try to save lost hikers, their helicopter crashes, igniting a large wildfire and injuring the pilot.
The team must facilitate peace discussions when a conflict in Eastern Europe threatens to escalate into World War III.
The members of the team travel to Mexico when the daughter of a tech billionaire is abducted Walter participates in an interview that leads to hurt feelings.
The team members go undercover on a cruise ship in order to locate and disable stolen rockets as Valentine's Day approaches, Ralph develops a crush.
The team must help an injured former Secret Service agent regain his memory in order to stop the launching of weapons of mass destruction.
The team searches for a CIA mole who has been coerced into stealing deadly chemicals Paige shows Walter how to flirt.
Three convicts -- including a brilliant hacker -- escape from prison Paige tries to manage Ralph's expectations when his dad returns.
After being accused of destroying a priceless piece of art, the team must pass a mandated psych evaluation Paige asks the team for help when Ralph is hesitant to go to the school Halloween party.
Walter and the team ask a troubled former associate for help when a nuclear reactor in Los Angeles is on the verge of a cataclysmic meltdown.
The members of the team disregard Cabe's advice and go to Las Vegas for a casino job a robbery leads to Walter being arrested.
After failing a military training mission, the team members are determined to prove themselves when an Internet infrastructure is threatened by a bomber.
The team is called upon by the governor when a virus leaves his daughter with only 24 hours to live Walter receives a letter about his sister.
When a crisis at LAX prevents dozens of airplanes from landing, the government brings in a group of misfit geniuses to sort things out.
The team heads to Northeast Africa, where they must carefully navigate a minefield to save the lives of local villagers Paige and Walter's relationship takes a shocking turn Toby and Happy make an important decision.