A tidal surge forces the castaways to relocate their camp. Still suspicious of the island and how they got there, Leah turns her paranoia on one of the other girls, viciously accusing her of knowing more than she's letting on. In flashback, Jeanette's astonishing backstory is unveiled.
A sudden illness rips through the beach camp, affecting nearly every castaway. As the girls fight for survival, we learn more about Leah's past and how she’s been faring since her rescue.
Starvation becomes a very real possibility for the weakened girls. Martha could spare them from that fate, but it would require a sacrifice she's not prepared to make. Flashbacks take us into her past, revealing the childhood trauma that's made it hard for Martha to grow up and rise to difficult challenges. Leah's paranoia about the island escalates to a fever pitch.
Assuming that rescue is imminent, the castaways let loose. The only girl who doesn't feel festive is Shelby, and a look into her past reveals why.
On the island, Leah feels closer than ever to proving that someone's behind their predicament. Post-rescue, fed up with the tight-lipped authorities, Leah goes searching for her own answers.
An entrepreneur from Surfside, Florida, presents a classic dessert with a healthy twist to children. Two safety-oriented engineers from Littleton, Colorado, share their product designed to boost visibility while navigating the streets. An entrepreneur from Los Angeles tries to convince the Sharks that her hands-free gadget is worth investing in. Finally, three entrepreneurs from Miami bring the Sharks into the future with their educational robot.
Ancient cultures recorded stories of enormous beings that descended from the sky; exploring if massive megalithic structures and reported discoveries of towering human-like skeletons reveal that the world was once inhabited by giants.
Riri is confined for a week as punishment for insubordination and sinks into depression over Yuri's death. The other members of her legion look for her missing hair tie, hoping to cheer her up, but will it be enough?
A small hole in the ship threatening the oxygen supply can only be repaired from the outside, forcing Martin to become the first kid to ever attempt a spacewalk.
David Bromstad and his Christmas helpers surprise his family with a spectacle of everything fun and festive! Using amazing tree designs, novelty garland, baked decorations and blankets of snow, David shares his tips for staging fabulous holiday decor.
Raquel continues to unravel a dangerous web of lies as she tries to determine whether she can trust even those closest to her.
A guilt-ridden Raquel must decide how to respond to the blackmail involving her upcoming exam. Iago starts to get to know Viruca outside of class.
Desperate to learn more about Viruca, Raquel dives deeper into the late teacher's life. In the past, Iago is devastated by a realization.
Roi decides to do some investigating of his own. Raquel starts turning to an unlikely source for comfort. Iago continues to seek attention from Viruca.
Raquel's fear of her students increases and she voices her concerns to Germán. Viruca struggles with how to resolve her parents' financial situation.
After her privacy is violated and being threatened, Raquel attempts to command respect from her students. Roi opens up to Viruca in his essays.
As Raquel gets closer to discovering the truth about Viruca's death, she puts herself in grave danger. Iago makes a torturous decision.