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.
Brooke tells Daniel and Hayley the last things she can remember before being hypnotized. Marcus makes a decision that stuns Louis and infuriates Judy.
While Daniel and Alex stall for time at the basketball game, Hayley sneaks into the cave and Max gets help from an unexpected ally.
Under the sea, Hayley experiences something that changes how she thinks about her mom. Believing the world is ending, Parker blurts out a confession.
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.
During a quiz game, know-it-all Aspen grates on Hayley's nerves and Brooke suffers a strange lapse in memory. Max misses Emma and tries calling her.
Eddie travels to Paris to open Europe’s first Meyerist Center, and he brings Sarah along with the hope to restore her faith; but her insatiable search for Lilith may have taken her beyond the point of no return. Meanwhile, Cal and Mary have their own plans.
The threat of violence is never far away as the Elm Heath team once again face up to a series of problems that our increasingly complex society just expects them to sort out without any fuss or acknowledgement.
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.
When Traves asks for help with his Internet girlfriend Candy, it looks like a classic case of catfishing. But after more pieces of the puzzle come together, the guys realize they may have caught a bigger catfish than expected.
Quentin faces his most formidable foe yet; Julia helps Alice with a dangerous endeavor.
Josh Gates continues his journey through Egypt to unearth the secrets and possibly the final resting places of Nefertiti and Cleopatra.
Deep-dive with Chilean devil rays in the Azores, track brown bears’ diets in Turkey, and follow dogs protecting flocks of sheep from gray wolves in Southern France.
Hayley and Daniel attempt to dehypnotize Brooke. Max and Jackie start to see a common thread behind all the strange events surrounding Emma.
Matt and Jake struggle to convince a coworker to wear a shirt on Casual Friday, and Christian seeks to strike a deal with a group of megachurches.
Shikadai and Ryogi became friends playing shogi, but lately Ryogi hasn't been coming to their usual meeting place. Shikadai's became worried about his friend's behavior the last time they met, but he's kept his concerns to himself. Ryogi is also worried about Shikadai, but is tormented by memories he can't forget.
How courage and ingenuity saved Allied troops during the epic Dunkirk operation in 1940.
The team tackles their first mountain, Ishinca, but the weight of their gear quickly wears them down. Nikki looks to redeem herself while Chuck’s cough raises concerns.