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.

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.

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

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.

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.

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

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.

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

Under the sea, Hayley experiences something that changes how she thinks about her mom. Believing the world is ending, Parker blurts out a confession.

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

Brooke scrambles to keep a secret from Alex during an upheaval at the Greenhouse. Sophie's past choices threaten her current status at the school.

While Daniel and Alex stall for time at the basketball game, Hayley sneaks into the cave and Max gets help from an unexpected ally.

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

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

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

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.

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

A remarkable gift from Ryan boosts the Ravens' flagging spirits. Becca smothers Leo with attention. Brooke makes an impulsive, ill-timed decision.

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

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.

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

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