The competition continues with the remaining ninjas from across the country facing off in a series of races with the hopes of being crowned champion.

A very pregnant Olivia surprises Layla with a visit just when Layla needs her the most. As Tori turns to Layla and Olivia for relationship help, they relive the best, the worst and the messiest of their friendship. Meanwhile, Cliff pulls KJ into his shady plans, and outside pressures become too much for Khalil as the showcase approaches.

Dennis and Dee are diagnosed with ADHD, and even more shocking: Mac isn't. They go back to school for a do-over now that they understand their brains more better.

The Librarians investigate an magical ley line at a 200-year-old resort known for its venerable puppet theater. Their attempt to turn the mission into a vacation is thwarted when they uncover a sentient puppet's evil scheme to destroy the resort.

Amy's favorite pop star commands her massive army of fans using musical brain programming.

Kiara and Pope search for a mysterious artifact that could unlock the Blue Crown's powers. Rafe faces mounting pressure to sell Tannyhill to developers.

Ash is hopeful when Gordon invites her on a weekend away - until she discovers that Brett and Chiara are joining them on the road trip.

On the night that celebrated architect Rowan Jameson is to receive a lifetime achievement award, he's thrown to his death from a hotel balcony. Following a second murder in Cambridge, Max and his team uncover a conspiracy linking both victims.

Alice spirals after Danny must decide what to do with sensitive information.

A gruesome discovery in the forest links back to a fateful night two years earlier. Can the killer be stopped before more police officers are murdered?