Aaron and Robert make a decision, Moira continues to evade Pete, and Victoria is the bearer of bad news.

Tempers fray in San Remo, Italy, as the group members fight for survival. Later, afternoon treasure hunt sees the celebrities get creative.

Rainie reaches breaking point, Martin's conscience gets the better of him, and Tiffany and Keegan make an announcement.

Noel Fielding and Sandi Toksvig host as the remaining bakers' knowledge of pastry is tested. The Signature challenge is a savoury take on a French classic, there's a multi-layered Moroccan Technical, and a towering Showstopper that requires not only an expertise with pastry, but also a solid grasp of structural engineering. With a place in the semi-final at stake, who will win the coveted Star Baker title from judges Prue Leith and Paul Hollywood?

The RNLI volunteers at Lough Ree Lifeboat Station race to the rescue of the last inhabitant of a remote island. On the north-east coast of England, the Blyth crew races to find a kayaker in trouble in the North Sea, while at Tower station in Central London, a dog is trapped by the tide on the River Thames.

Frankie returns to Holby, keen to take Isla back. Essie is not convinced she is truly ready for the demands of parenthood, and tries to persuade her to leave her daughter behind. A top neurosurgeon has a radical idea for how to treat Ric's tumour, but Serena is not convinced by the plan. Ric is left to consider both their positions, and decide what he wants to do. Jac returns from holiday, and asserts her authority over an overworked Kian.

Alan Titchmarsh heads to Swindon to surprise Lorraine, retired RAF service-woman and devoted charity volunteer by creating a low-maintenance garden for Lorraine and her dogs.

Despite Rob's promise to Cassie that they won't investigate Operation Vestal because of Rob's intense relationship with Knocknaree, he convinces her that they are the best people to solve this case.

They make a dark bargain: to keep Rob's secret, because he has insider knowledge of that estate and he believes the two cases could be linked. Now she and Rob are locked into a secret, and Operation Vestal is born.

As the investigation gets underway, what is increasingly undeniable is that there's an atmosphere around Knocknaree and the Devlin family.

Just as Rob and Cassie feel they are making progress Cassie has her own visitation from the past.

A profile of Angus Sinclair, the man responsible for the murder of two teenage girls in 1977, known as the World's End Murders.

Chambers is putting the pupils through their paces in a professionally acted mock trial.

Liam and Danielle spend time with the actors to plan their case, only for Liam to fudge the boundaries between reality and fiction.

Meanwhile Will learns the dark art of cross-examination from Caroline - only to find it's a skill he's going to need in his personal life too.

Kat and Jo want Amar and Sunny off the boat. Jo is upset about ex-boyfriend Rob and decides to get her phone to call him. Amar joins her, determined to find a car.

Kat meets her online gaming idol, BIGDAMEHERO, and doesn't listen to Sunny's words of warning. When she turns into a zombie, Kat realises Big is actually a liar and her nemesis!

Amar helps Jo out of a zombie pile-up. They arrive back to find Sunny overboard, and Kat killing BigDameHero. Kat and Jo accept that perhaps Sunny and Amar can stay on the boat after all.

Batman pretends to be sick to avoid work so he and Commissioner Gordon can run around town watching their favorite shows.

Charlie and Rex pull apart the secrets of a local band when their lead singer is found dead on the beach.

Returning Champion;

Faced with the news of his impending death, Barry's resiliency suffers as he struggles to fight fate. Meanwhile, Cecile's career as a D.A. conflicts with her identity when she crosses paths with a villainous meta-human.

Henry Louis Gates, Jr. explores the humble roots of comedic actors Melissa McCarthy and Eric Stonestreet, retracing the ancestral journeys that laid the groundwork for their success.

The NCIS team links a bizarre crime scene at Arlington National Cemetery to a string of attacks on homeless veterans. Also, Vance orders McGee, Bishop and Torres to complete hours of evidence garage cleanup duty for withholding information.

When Devon's patient, who was pronounced dead, suddenly revives, Conrad is left doubting Devon's judgement and wondering what happened. A well-known white supremacist falls under the care of Cain and Nic, causing the two to butt heads on how to move forward. Meanwhile, on their way to a medical convention, The Raptor and Mina get stuck in a strange town, where they uncover new information about Red Rock Medical.

The "Battle Rounds" continue as the coaches enlist music industry powerhouses Normani (Team Kelly), Darius Rucker (Team Blake), Usher (Team Legend) and will.i.am (Team Gwen) to prepare their artists to go head-to-head in the hopes of advancing to the "Knockout Rounds." Each coach has one save and one steal available during the "Battles."

Desperate for more income, Becky seeks a bartending position at Casita Bonita, causing major concern for Dan due to her struggle with alcoholism. Meanwhile, Darlene finally nears a decision between David and Ben; and Harris' new friend, Odessa, means new trouble.

While trying to decipher The Monitor's mission, Oliver returns to Starling City where he encounters familiar faces. Meanwhile, Mia and William's team clash with a new foe.

After a shooting at a nightclub, it appears that the FBI may have ignored previous threats from a local white supremacist group. Also, Kristen wrestles with her commitment to the Bureau and her responsibility to her community.

Casey Webb's nationwide feast brings him to Alaska, where he cracks into crab legs fit for a king at Slippery Salmon Bar and Grill in Anchorage. In Talkeetna, he samples the local wild game, ordering a slab of reindeer meatloaf at Denali BrewPub and the mountainous, double-decker Sewards Folly caribou burger challenge at West Rib Pub and Grill.

A happy family occasion brings the Lyon family back together, but it becomes apparent that no one seems to see eye-to-eye. Lucious, unhappy with how Empire and the Empire movie are progressing, springs into action and comes face-to-face with demons from his past. Meanwhile, Cookie reaches her breaking point and considers seeking help and Andre encourages Tiana to smooth over the controversy she created for the company.