A chance encounter with an impoverished child forces Trixie to see an unfamiliar darker side of life. As Nonnatus House welcomes a new resident, Nurse Barbara Gilbert, Tom Hereward has a surprise romantic gesture in store for Trixie.

Hannah moves into a new place and is thrilled with the amount of space she can afford, but struggles with life as a grad student when her fellow workshop writers don't give her the feedback she expected.

Marty cunningly proves his business savvy when he meets electric car mogul, Ellis Hightower. In desperate pursuit of a new client, Jeannie orchestrates a chance encounter that appears to go terribly awry. Marty accuses Jeannie of being a dishonest person, prompting her to reveal a difficult truth.

K.C. Cooper, a high school math whiz and martial arts expert, learns her parents are spies when they recruit her to join them in the secret government agency. The newly appointed teen spy takes on her first undercover assignment, which coincides with her school dance. The mission: apprehend an enemy teen spy and recover the code for a virus designed to render every mobile device useless.

Bo and the gang deal with the aftermath of a storm.

After a series of inexplicable events, Bellamy fears for the safety of Rachael and her unborn child. Preacher James predicts that the baby's birth will unleash an ancient evil. Margaret rallies the Returned at the government facility and forms an uneasy alliance with Preacher James, and Bellamy's government contact warns that something big is on the horizon,

In order to survive, Emily and Victoria must set aside their grudge, while Jack and David race to save them before they kill each other.

Team Scorpion is tasked with uncovering a mole inside the CIA whose judgment is clouded by matters of the heart and is being coerced into stealing deadly chemicals. Also, in preparation for the case, Paige gives Walter a flirting lesson.

Sheila gets an offer to buy her home. Plus, Fiona is off house arrest!

A missing-person investigation uncovers what appears to be an alien invasion in a small rural town.

When Dulaque changes the course of Fate, Baird starts moving through alternate timelines, each showing the changing destinies of the Librarians – and her own inevitable doom.

Jeremy Clarkson, Richard Hammond and James May exclusively preview the forthcoming new series of Top Gear in front of a studio audience and online fans from around the world at a special event in London.