Hayley and Daniel attempt to dehypnotize Brooke. Max and Jackie start to see a common thread behind all the strange events surrounding Emma.

When Hayley tells her brother and friends the big news, they argue over whether to take action. Max and Jackie are caught trying to contact Emma.

Hayley's determination to get to the bottom of an annoying beeping noise unwittingly sets a deadly chain of events into motion.

When Aspen's jealousy gets the better of her, Leo tells her they need to talk. Judy and Marcus trigger a test quake and get unexpected results.

Leo awakens in the cave. During dinner with their parents, Brooke and Daniel carry out a plan to get Emma's white knight chess pieces from Jason.

As time runs out on a bomb designed to destroy the cave and the rest of the Greenhouse, the students in the gym must get past police to make a rescue.

Members of the Eagles and Ravens team up on a risky mission to find a valuable chunk of magnetite. A disheartened Brooke looks to make a fresh start.

When the Eagles and Ravens start getting too friendly, the headmaster sends them on a grueling two-day hike devised to reignite their competitive fire

Brooke tells Daniel and Hayley the last things she can remember before being hypnotized. Marcus makes a decision that stuns Louis and infuriates Judy.

Sophie finds herself shunned by all the Eagles -- except for one. Daniel gets a hunch as to who might be influencing Brooke's recent behavior.

While the Eagles and Ravens compete in a capture-the-flag challenge, Enzo receives a mysterious offer that's too lucrative for him to question.

After catching his mom in lie, Daniel compares notes with Hayley. Aspen makes a slip that shocks Leo. Jackie is tricked into confessing a past misdeed.

Leo's setback creates tension between Hayley and Daniel. Meanwhile, an FBI investigation results in several major revelations.

Trusted with personal information, Becca and Daniel each battle their true emotions. A schedule change poses a serious problem for a shadowy enemy.

As Hayley considers a risky way to save her classmate, the Eagles and the Ravens have a theory about the mystery virus.

The shadowy enemy puts a sinister plan in motion. Later, Sophie investigates questionable news while Daniel debates making a confession.

As the Eagles and the Ravens examine evidence from an attack, a suspicious text from Leo leads them all to a shocking discovery.

Eight months after the sudden loss of his astronaut mom, Alex undergoes rigorous entrance testing to attend the same leadership high school she did.

At the school's Harvest Fair, the Eagles and the Ravens compete to see which team can raise more scholarship money by marketing and selling cupcakes.

For their first challenge, the Eagles and Ravens compete to solve a riddle. To be accepted by his team, Alex distances himself from his older sister.

After an explosion rocks the school, one student hopes for a rescue while another one faces a threat from a mysterious virus.

The Eagles' two candidates for team captain face off in a debate. In class, the students argue over a hypothetical moral dilemma.

Ryan's letter reveals a secret she kept from her husband for years. When Emma turns him down, Max takes Jackie instead to the Halloween dance.

The Eagles pressure Alex to help them get revenge against the Ravens. FBI agents look for a weapon lost near campus and suspect a student took it.