This week's UK TV & radio

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Listings for Channel 4 on Tuesday, May 1 2018

06:00Countdown Nick Hewer and Rachel Riley host as contestants race against the clock to pit their wits against vowels, consonants and numbers. Pasha Kovalev is in Dictionary Corner with Susie Dent. 
06:453rd Rock from the Sun Near Dick Experience When Sally, Harry and Tommy just miss being hit by a falling chandelier at a local restaurant, they believe their near-death experience has given them enlightenment. 
07:103rd Rock from the Sun Dick's Big Giant Headache (Part 1/2): The Big Giant Head warns the aliens their mission has received a sub-standard evaluation and he's on his way to Earth to find out what's gone wrong. 
07:35Everybody Loves Raymond Look, Don't Touch Debra is suspicious when Angelina, a waitress at Nemo's, calls Ray at home. Although it's all perfectly innocent, Ray feels guilty. 
08:00Everybody Loves Raymond Frank, the Writer Frank submits ideas for a column to Ray's editor after getting anecdotes published in Reader's Digest. But Ray's editor thinks it's the worst writing he's ever seen. 
08:30Frasier Shut Out in Seattle (2/2): In the concluding part of the sixth season finale, will any of the Crane men sort out their romantic problems? 
09:00Frasier Momma Mia Niles and Martin get the shock of their lives when they meet Frasier's new date: she's the spitting image of his mother. 
09:35Frasier Father of the Bride Frasier and Martin inadvertently offer to pay for Daphne's wedding. Meanwhile, Frasier's meddling drives Daphne crazy. 
10:05Ramsay's Hotel Hell Gordon confronts the miserly owner of the Lakeview Hotel on Lake Chelan, Washington, where the bedrooms are empty and the establishment's restaurant and ice cream parlour are failing. 
11:00Undercover Boss USA Sara Bittorf, Chief Brand Officer of Boston Market, which has 470 restaurants offering diners home-style comfort food, goes undercover to work alongside employees in her own organisation. 
12:00Channel 4 News Summary Channel 4's midday news summary. 
12:05Coast vs Country John and Carolyn are looking for their dream property in Devon with a budget of ?700,000. Carolyn loves the country lifestyle, but John wants to enjoy the buzz of the coast. 
13:05Posh Pawnbrokers In Sheffield, Dan goes on the hunt for some paintings worth tens of thousands, and there's a solid silver hat. In London, Nathan and Debbs do a deal on an antique wine cabinet. 
14:10Countdown Nick Hewer and Rachel Riley host as contestants race against the clock to pit their wits against vowels, consonants and numbers. Chris Packham is in Dictionary Corner with Susie Dent. 
15:00A Place in the Sun: Home or Away Ceri and Mike Green are retiring soon and want to settle down, but can't decide between the Lake District and the French Alps. Jonnie and Laura lend a helping hand. 
16:00Escape to the Chateau: DIY Nicole visits Angel to ask her about some wallpaper. Tim and Margreeth get ready for Easter, and Paul and Alison prepare a party to launch their new wedding terrace. (Ep17) 
17:00Four in a Bed The second visit of the week is to The Redstone in Blackpool. The mood quickly turns sour during an afternoon of cake decorating, and one of the guests doesn't turn up for breakfast. 
17:30Buy It Now Hairdresser John from Scotland demonstrates his new hair product; Andre has flown in from Germany to show a solution to exercise boredom; Rifit has a new kitchen aid. (Ep12) 
18:00The Simpsons The War of Art Marge and Homer face a moral dilemma when they buy a cheap painting at the Van Houten's garage sale and later discover that it's an extremely valuable artwork. (S25 Ep14/22) 
18:30Hollyoaks Maxine is still furious with Adam, but Glenn gives Grace the challenge of sorting it out. Alfie embraces his wild side, while Farrah is getting nowhere in her search for Kim. 
19:00Channel 4 News Includes sport and weather. 
20:00Class of Mum and Dad It is the last week of term and some of the parents are starting to panic at the prospect of sitting their SAT exams, as the real Year 6 prepare to leave for secondary school. (Ep4/4) 
21:00My F-ing Tourette's Family In a quiet corner of Oxfordshire the Davies-Monk family are coming out to the world about their sons' Tourette's, with day trips, meals out, and even their first ever holiday abroad. 
22:00Surviving the Island with Bear... ...Grylls In the final programme of this year's adventure, Bear arrives on the island eager to get the stories behind the castaways' class war and their often dubious survival strategies. 
23:05Flight HS13: Walter Presents Where Is Simon? Liv's brother-in-law Erik, a police detective, decides to help her find Simon. Simon takes Leyla and Omid to an abandoned holiday cottage. In Dutch and Farsi/subs. (Ep2/10) 
00:00Ramsay's Kitchen Nightmares USA Gordon travels to Eagle Rock, California, to visit Capri - a restaurant in a rut that's owned by identical twins Jim and Jeff. 
00:55One Born Every Minute Rose had a stroke during her pregnancy and now arrives for a planned C-section. Chynna and Spencer are both 21. They're expecting their second child together. (S11 Ep8/10) 
01:50The Supervet The series about Noel Fitzpatrick's pioneering veterinary practice. German shepherd Otto has a life-threatening tumour. Pomeranian puppy Gucci has broken her paw. (S2 Ep1/7) 
02:45The Channel: The World's... ...Busiest Waterway: This episode has unprecedented access to the Channel Tunnel, meeting the engineers who keep it running and truckers trying to avoid 20-mile traffic jams. (Ep2/4) 
03:40Come Dine Champion of Champions It's the final, and the week's four winners vie to be Champion of Champions. Only two can go through to the dessert finale to face the ultimate challenge set by Glynn Purnell. (Ep5/5) 
04:35Steph and Dom's One Star to... ...Five Star: The couple challenge the owners at Elnor Guesthouse to create a luxury picnic breakfast, makeover a bedroom to cater for families and host a cake-decorating class. (Ep13/30) 
05:00Kirstie's Vintage Gems Kirstie Allsopp helps Amber and Colin turn their love-starved bedroom into a gorgeous vintage haven. 
05:10Fifteen to One Sandi Toksvig presents the notoriously tough quiz show as 15 contestants compete to win a place in the Grand Final. 
06:00Countdown Nick Hewer and Rachel Riley host as contestants race against the clock to pit their wits against vowels, consonants and numbers. Pasha Kovalev is in Dictionary Corner with Susie Dent.