A car chase switches gears when the driver flees on foot; tempers flare between neighbors after some kids get physical; a nervous driver becomes irate when the police search his passenger.

Having lost contact with the Protectors of Concord Dawn, Sabine, Ezra, and Fenn Rau investigate and find the base occupied by Imperial Mandalorians.

Digging into Patrick Spring's past, Farah and Dirk discover the first really big clue into his murder. Todd goes to the police only to learn he has no safe harbor left. Amanda must deal with a looming presence in her life, and Bart and Ken hurtle towards a violent clash with a biker gang.

Host Benedict Cumberbatch; Solange performs.

With King George too ill to travel, Elizabeth and Philip embark on a four-continent Commonwealth tour. Party leaders attempt to undermine Churchill.

Sarah's goes into labour. James supports Olivia as she faces a heartbreaking truth. Elizabeth gets a wonderful surprise. George's poor timing leaves him on shaky ground with Sarah. Roy tries to provide Sarah some comfort amongst the chaos.

The team battles a new super-villain, the U-Foes, while the arrival of a new government liaison threatens Hulk's place on the team.

For the first time, the Turtles encounter something they cannot defeat - the Super Shredder!.

Tess Daly and Claudia Winkleman reveal the results of last night's show, before the two couples with the lowest combined scores compete in a dance-off to decide who will be going through to next week's round and who will be leaving the competition. Plus, Gary Barlow performs songs from the musical Calendar Girls and Len Goodman takes a close-up look at last night's routines.

Debbie continues her quest to win back the hearts of Yonderland's people and reveal Cuddly Dick's true colours. Meanwhile, Negatus meets his scary new cell mate.

Remote islands offer sanctuary for some of the planet's strangest and rarest creatures. The rare pygmy three-toed sloth enjoys a peaceful existence on an idyllic Caribbean island, while nesting albatross thrive in predator-free isolation.

But island life always comes at a cost. On the Galapagos Islands, young marine iguana must escape an onslaught of deadly racer snakes the moment they hatch from the sand. On the sub-Antarctic island of Zavodovski, life gets more extreme still. Every day, one and a half million penguins risk being battered against the rocks by fierce waves as they try to get on and off the island.

The results of last night's live show are revealed.

Elizabeth tells George that she is carrying his child and George continues to mark his territory by erecting fences around Trenwith, denying commoners passage across his property. Dwight learns of Caroline's new engagement and enlists in the navy. Ross decides he must mend the rift between Caroline and Dwight before it is too late. Ross is called to Trenwith by George, suspicious that the purchase of Geoffrey Charles' share in the mine was fraudulent. Pascoe reveals to Ross that George will seek to bankrupt him through court proceedings. Demelza is assaulted for trespassing on Warleggan land provoking the villagers to march on Trenwith with vengeance in mind - will Ross be able to disband the mob? Elizabeth, meanwhile, is forced to face the possibility that her pregnancy might not, in fact, be the result of her union with George.

Laura must decide whether to accept Niska's request, while Karen and Pete learn about a special Synth being sold for unprecedented amounts on the black market. Hester uses questionable means to gain information from her prisoner, and Leo faces a new mission. Mia takes a risk to help Ed but is her secret now in jeopardy?.

As the investigation is brought to a close, Chief Superintendent Prosser confronts an old foe.

Evelyn tries to heal the breach between her father and Carter. But Carter is stubbornly proud and won't even speak to his former patron. He's hiding out back in his tomb, feeling like the whole world has turned against him.