Exploring a secret subterranean network in London that inspired James Bond author Ian Fleming, and an Italian country retreat that was designed to brainwash a generation of children.

The fifth heat takes place aboard HMS Wellington at Temple Pier in Westminster, where Stephen Mangan is joined by judges Tai Shan Schierenberg, Kathleen Soriano and Eva Langret.

Four-year-old Skyler is rushed into paediatrics care with recurring seizures - he's experienced them previously, but the length of this episode is a serious concern for the team. Consultant doctor Laura Buxton is put in charge of 85-year-old Maureen's care - she has a slow heartbeat. Emergency nurse practitioner Clare examines 65-year-old Shaun's suspected broken toe.

Back in 2024, Kirstie Allsopp and Phil Spencer helped Stockport foster carers Jacqueline and Renee decide what to do about their extended six-bedroom home. A renovation hadn't solved their issues and Renee felt that starting again was their only option. Jacqueline, however, still had faith that the house could work - with a smart design from Kirstie to improve the flow and make use of wasted space. This edition looks back at their story before Phil catches up with the couple to see how they have been getting on.

On final approach to Islamabad in heavy fog, Airblue Flight 202 slams into the Himalayan foothills, killing all onboard.

The challenges for another group of contestants aiming for a place in the quarter-finals include preparing a dish of steamed razor clams and a dessert with authentic cranachan cream.

The fallout from the brutal bridge chop, which saw the mountain claim its first victim, is still simmering as construction manager Dockers is singled out as a game-player and not to be trusted. After the group endure a gruelling eight-hour uphill hike weighed down by prize money, the Mountain's Keeper presents them with a difficult dilemma. Ben Shephard presents.

Angus Ashworth helps a widower sell nautical treasures, including a diving helmet. He also visits a family clearing their late gran's home, uncovering gold.

Surgeons Andrew Kay and Richard Irving attempt to help 28-year-old Abi, who is suffering from debilitating facial pain caused by a tumour near her brain, which is compressing the trigeminal nerve leading to her face. The will attempt to carve a hole in the side of her skull and detangle the tumour from her nerve before sucking it out in tiny pieces.

Dr. Emma is shocked when 35-year-old Faizah's 'herbal' cream bought online leaves her skin red, raw, painfully inflamed, and itchy.

Highlights from nine Premier League games from a busy midweek schedule including Manchester City versus Sunderland, Sunderland against Liverpool and Manchester United's trip to West Ham. Elsewhere, Chelsea take on Leeds United, and Tottenham face Newcastle. Gabby Logan presents.