In the season finale, the team, although torn apart and uncertain as to their future, must come together to save Walter's life as his car hangs off the side of a cliff.
Walter learns Cabe's long-hidden secret regarding the Baghdad mission and it threatens to tear Team Scorpion apart. Meanwhile, Ralph puts his life in danger to help the team.
Team Scorpion's helicopter crashes while on a mission to save lost hikers. The crash ignites a massive wildfire that quickly closes in on them. Meanwhile, Sylvester tries to help the injured pilot who is unable to make it to safer ground.moreless
Team Scorpion is asked to assist secret peace talks when a conflict in Eastern Europe heightens and threatens a World War III scenario.
A tech billionaire hires Team Scorpion to rescue his kidnapped daughter. Meanwhile, some feelings get hurt when Walter gives an interview and fails to acknowledge the other members of the team.
Team Scorpion work undercover on a cruise ship to locate and disable stolen rockets. Meanwhile, Toby and Happy help Ralph deal with his first crush, as Valentine's Day approaches.
To prevent nuclear weapons from being launched from a secret U.S. nuclear silo, the team has to prod the memory of their only hope, an injured former Secret Service agent. Drew proposes that moving to Maine might be best for Ralph.moreless
The team must uncover the mole inside the CIA who's stealing deadly chemicals. Paige gives Walter a flirting lesson.
Team Scorpion try to save a boy on Christmas Eve when he gets trapped in a beach-side cave and the rising tide threatens to drown him.
Sylvester is seriously injured when he accidentally triggers an explosive device during an investigation; and Team Scorpion search for who is responsible.
Team Scorpion tries to recover stealth technology before it falls into enemy hands when a military plane is shot down in Bosnia. Meanwhile, Walter's sister takes a break from her MS treatment and spends time at the garage with Sylvester.moreless
The team tries to protect Cabe's ex-wife, after she uncovers evidence that suggests foul play in the death of a prominent congressman.
A musician, who created a controversial algorithm that generates hit songs, helps Team Scorpion find a music blogger's murderer. Meanwhile, Drew asks Walter to help him connect with his son.
Three convicts break out of prison and the investigation reveals that one of the escapees is a brilliant hacker who is being forced to help the other two steal billions of dollars online. Meanwhile, Paige tries to manage expectations for Ralph when his father returns.moreless
Team Scorpion must pass a mandated psych evaluation or face being disbanded after they are accused of destroying a priceless work of art. Meanwhile, Ralph is reluctant to go to his school's Halloween party, so Paige asks the team to step in and help.moreless
Walter enlists the help of a former troubled team member when a Los Angeles nuclear reactor is on the verge of a cataclysmic meltdown.
Team Scorpion go to Las Vegas for a simple casino job, but a robbery leads to Walter's arrest, leaving his colleagues to try and clear his name.
A bomb strike threatens the Internet infrastructure for the entire Southwest. Meanwhile, Team Scorpion fails a military training operation and becomes determined to prove themselves.
Scorpion is called in to save the Governor's daughter when she is somehow "bio-hacked" with a deadly virus and is given 24 hours to live. A letter about his sister, gives the case new meaning for Walter.moreless
Computer genius Walter O'Brien and his equally brilliant friends investigate high-tech crimes. In the opener, Walter and his misfit colleagues are hired by the government to solve a crisis at the Los Angeles airport that leaves dozens of planes unable to land.moreless
Sookie becomes a reluctant host of a festive mainstreaming party in Bon Temps. Eric and Pam, continuing their search for Sarah Newlin, head to a fundraiser in Dallas. Andy decides on a life-changing decision, while Jessica and James reach a moment of truth. Bill finds himself remembering his human days.moreless
Sookie tracks down H-vamps with a posse of vampires and humans.
Annie and Professor Hickey work the Greendale bureaucracy to get a bulletin board back on the wall. Jeff, Chang, Shirley and Professor Duncan discover the challenges of planning a school dance.
Eric tries to save Nora by pledging allegiance to Bill. A tragedy forces Sam to return to Bon Temps, completely ignoring Alcide's threat. Jessica shows her appreciation to James. Sarah gets her revenge on Jason.moreless
To escape Bill's influence, Sookie flees to the land of the Fae. Bill decides to ask Lillith for help with the human-vampire crisis. Eric along with Pam, Nora, Jason and Jessica are in grave danger from Vamp Camp dangers. Sam comes to a decision about Emma. Andy names his faerie daughters. Arlene finds an answer for Terry's depression. Eric discovers a surprising find.moreless
Sookie asks Lafayette to contact her dead parents so she can find out more about her past. With Pam in peril, Eric and Tara use extreme measures to rescue her. While Jessica looks to make amends, Sarah hooks up with Jason. Warlow reminiscences about Lillith.moreless