A crew battles bad weather in Cumbria to reach injured 70-year-old hill-walker Jenny, while Scott's attempts at DIY land him in serious trouble, and biker Ronald needs urgent treatment after a crash

Medics fly to the aid of teenage mountain biker Steven, a multi-vehicle collision in Bedford leaves 32-year-old Ashley with potentially life-changing injuries, and Nicola steps in to save her husband Michael's life when he has a cardiac arrest

Eighty-four-year-old Paula is referred to St George's for urgent treatment, after a routine blood test detected that she has a dangerously high level of potassium in her blood. Meanwhile, 74-year-old Derek is brought into A&E after suffering a suspected stroke. As he goes for emergency surgery, his devoted wife Mary is determined to help him recover. Plus, 31-year-old fireman Glenn arrives with a suspected abscess in his throat; he is joined by his twin brother Dean, and the pair prove to be inseparable

Jimmy Doherty, Kate Quilton and Matt Tebbutt present some of their favourite investigations. In Israel, Kate unearths the mystery ingredient that makes icing sugar so light, fluffy and powdery. In Iceland, Jimmy investigates Skyr, a mysterious yoghurt-like product, and in Cornwall, Matt dives for edible seaweed that has started cropping up on supermarket shelves

Max McMurdo and Simon O'Brien are in Woking, Surrey, where they find a sidecar - to be transformed into a boat - and a water cylinder that Simon might make into a trendy lamp

Henry Cole and Simon O'Brien visit Herefordshire to meet former farmer Julian. Henry finds an old cattle feeder that he wants to turn into a garden bench, while Simon hatches plans to turn a vintage seed drill into a trendy dining table

Another quartet of B&B owners battle it out to decide which of their establishments provides the best value for money, beginning with Paul Billington and Flora Loizou from Silverwood Lodge in Cambridgeshire. The couple get a frosty response when one guest learns her hosts do not live on-site, while another is left in hysterics by an unexpected discovery

The group sets off for Great Yarmouth to stay in Sue Dodd's dog-friendly Seashells Guesthouse. Spirits run high with a trip to the beach and a game of bingo, but Nancy's complaints over dog hairs on the sheets and smoking in the rooms bring down the light-hearted mood during dinner

American ex-banker Nancy Hampson hosts at the Old Court Guesthouse in Bath, but her vocal criticisms of the week's first two establishments have made her no friends among her fellow competitors. Paul Billington is annoyed that the bed he and wife Flora Loizou are given is not big enough, but is more impressed when taken for food at a quirky local restaurant

The guests stay with Caroline Scott, the owner of the Dean B&B near Longniddry, East Lothian The picturesque house and breathtaking views across the Firth of Forth win everyone over, but underwear in the drawers, cobwebs on the curtains and a messy breakfast service seriously hamper the host's chances of success

The contestants meet one last time to discover how much they have been paid by their fellow hoteliers and to air their grievances. Sue from Seashells in Great Yarmouth confronts Nancy Hampson about the controversial topic of smoking in bedrooms, while Paul Billington and Flora Loizou are held to account about their low mark for the Old Court Guesthouse

Bargain-hunter Heidi hosts the first of five dinner parties in Hertfordshire, hoping her adventurous Asian menu will impress set her on the way to the £1,000 prize

In the second night from Hertfordshire, bank clerk Sylvia hosts a 1980s-themed evening featuring a menu of Spanish cuisine and a show-stopping tribute to Madonna

Showbiz journalist Benji hosts the third dinner party of the week in Hertfordshire, hoping to impress his guests with a Gran Canaria-themed night featuring airline-inspired dishes

The fourth host in Hertfordshire, children's nurse and guide leader Nicky, plans a menu inspired by her dream visit to Asia, with complicated home cooking and geographical grub

On the last night in Hertfordshire, party-loving Mark hosts a Greek evening, with saganaki and lamb kleftiko on the menu. Mark's kept his cards close to his chest all week, so his guests are keen to find out more about him, on a night that ends with an action-packed obstacle course around his kitchen, and an emotional moment at the dinner table

Tim and Jules Anderson are first to host at the King's Head and Queen's Jules in Suffolk, where they provide their guests with a lesson in how to fillet fish, and an evening of karaoke. However, the owners find criticism hard to take the following morning

Gordon and Blossom welcome their rivals to the Hotel Continental in Harwich, Essex, where they are greeted by an erotic art display. The guests enjoy participating in a poetry reading during the afternoon, each writing their own piece, but the morning's breakfast goes awry after the hosts have a disagreement

Ryan Davies has to deal with a crisis when the contestants stay his five-star B&B Llanerch Vineyard in south Wales, but still manages to impress with his location and selection of wines. However, Gordon and Blossom go on a fault-finding mission and leave feedback the host is not happy with

Neil and Tracy Bullows, owners of the Whitehall Hotel in Darwen, Lancashire, play host to the last night of the week's competition. Hoping to impress with a mix of professionalism and efficiency, they decide to take their guests on a tour of a local paint factory, but tempers fray and a stony silence follows at breakfast