Tim and Simon learn about ravens. Simon makes harrisa roasted carrots. Jason Atherton cooks sea bass, crab and daikon with mash. Paloma Faith performs Loyal live.
Tim and Simon learn about schadenfreude. Simon makes salmon fish cakes with tomato sauce, while guest Chef April Jackson cooks oxtail shepherds pie. Plus Jain performs Dream live in the studio.
Tim and Simon learn about blue plaques. Simon makes stuffed chicken thighs. Guest Chef Nadiya Hussain makes carrot cake pakoras with a cream cheese dip. Olly Murs performs live.
Tim and Simon meet a director of BBC's Dynasties. Simon makes dynamite shrimp and cherry chocolate bars. Guest chef Prue Leith cooks polenta with garlic mushrooms and kale. Anne-Marie performs live.
Tim and Simon learn about the book 1918. Simon makes blueberry and cream cheese empanadas. Guest chef Theo Randall cooks taglierini with brown shrimps and artichokes. Ghetts performs live.
Tim and Simon learn about gong meditation. Simon cooks a vegan strawberry cheesecake. Guest chef Jeremey Pang makes some steamed bao buns, and Nao performs her new single live in the studio.
Tim and Simon learn about vampires. Simon makes fiery pumpkin pancakes. Guest Chef Tom Kitchin makes razor clams with vegetables and chorizo. Alessia Cara performs Trust Your Lonely live.
Jamie Laing guest hosts with Tim, and they both learn how to tap dance. Guest chef Tom Kerridge makes Portuguese mussel stew. Zoe Adjonyoh makes puff puff doughnuts. Tom Odell performs live.
Tim and Simon meet some police puppies. Simon makes cauliflower cheesecake and a tres leches cake. Guest Chef Angela Hartnett makes cep tagliatelle, while Tom Grennan performs live.
Tim and Simon learn about fictitious pirates. Simon makes rosewater pancakes. Guest chef April Jackson makes ackee and salt fish with fried dumplings. KT Tunstall performs live.
Tim and Simon learn all about the sun. Simon makes popcorn chicken with a spicy dip and guest chef Yotam Ottolenghi makes braised eggs with leeks and za'atar. Live music from Elle King.
Tim and Simon learn about polar worlds. Simon makes vegan pulled jackfruit tacos. Guest chef Olia Hercules cooks poussin tabaka in blackberry sauce. Gorgon City performs with JP Cooper.
Hannah Fry teaches Tim and Simon about algorithms and data. Simon makes sour cream apple pie. Guest chef Bethany Kehdy cooks nectarine kebbeh with za'atar and sumac. Live music from UK rapper Yungen.
Tim and Simon learn about the amazing qualities of liquids. Simon makes a blood orange and rhubarb crumble. Guest Chef Donal Skehan cooks garlic and rosemary chicken with tomato. MNEK performs live.
Tim and Simon learn about urban birding. Simon cooks halloumi and gorgonzola fritters. Guest chef Nisha Katona cooks marrow curry, and Christine and the Queens sings live.
Tim and Simon delve into the world of kiteboarding. Simon makes cumin and cinnamon lamb, and guest chef Ping Coombes cooks chicken rendang with roti jala. Plus live music from Maggie Rogers.
Tim and Simon learn about the Highland Games. Simon makes a watermelon and feta salad. Guest chef Clodagh McKenna creates rosemary lamb cutlets with grilled peaches, and live music from Years & Years.
Tim and Simon learn about the science of sin with Jack Lewis. Simon cooks a sultana sponge with buttercream. Guest chef Josh Katz cooks a merguez patty melt. Miles Kane performs live.
Tim and Simon learn about ants. Simon makes peanut butter and jelly chicken wings. Guest chef Freddy Bird cooks a fish stew with alioli. Rudimental perform their latest single live.
Tim and Simon learn about Elizabethan dancing. Simon cooks his version of cheese on toast. Guest chef Bryn Williams makes Welsh roast lamb. Slaves perform their new single Cut and Run live.
Tim and Simon learn about silk screen printing. Simon cooks a lamb naan sandwich. Guest chef Jack Stein makes crab shangurro. Rick Astley Performs new single Beautiful Life.
Tim and Simon meet some alpacas. Simon cooks flat bread with pea pâté. Guest Chef Nadiya Hussain cooks cheddar frangipane tart, while musical duo Sofi Tukker performs Best Friend live.
Tim and Simon learn about the RAF. Simon cooks peach and cream cheese pie. Guest chef Martin Morales makes duck with aubergine and labneh. Plan B performs his new single live.
Tim and Simon learn about bee conservation. Simon cooks Punjabi kadhi. Guest chef Jeremy Pang makes chicken satay with freekeh and nasi goreng. Lady Leshurr performs live.
Dean Burnett brings in his new book The Happy Brain. Simon cooks a schnitzel burger. Guest chef Tim Siadatan cooks wild salmon with panzenella. The Charlatans perform Totally Eclipsing live.
Tim and Simon get a ballet masterclass. Simon cooks monkfish goulash. Guest chef Sophie Michell cooks a pistachio cake with rosewater icing. Jason Mraz and Blossoms perform live.
Tim and Simon learn about sign writing. Simon cooks Tom Yum soup. Guest chef Daniel Galmiche cooks Norwegian fjord trout with fresh grape sauce vierge. Jorja Smith performs Blue Light live.
Tim and Simon learn about corgis for the Queen's official birthday. Simon cooks beef kapama. Guest chefs Katie and Giancarlo Caldesi make fresh pasta with Roman raw sauce. Biffy Clyro perform live.
Tim and Simon gets to grips with the origins of dentistry and evolution of teeth. Simon cooks kung pao chicken and Rebecca Seal celebrates National Biscuit Day. Plus Sigrid performs live.
Tim and Simon take a masterclass in jousting. Simon cooks salt cod with honey, and chicken with walnut sauce. Guest chef Omar Allibhoy makes tapas and sangria. Plus live music from Jess Glynne.
Tim and Simon learn about Ancient Rome and the Romans with Jackie Keily. Simon cooks bacon and egg puff pastry pie. Tommy Banks makes John Dory with young vegetables. Plus Yxng Bane performs live.
Tim and Simon learn about the intricate art of tapestry weaving. Simon cooks kimchi fried rice and guest chef Clodagh McKenna makes garlic chicken Kiev. Plus Frank Turner performs live.
Tim and Simon spend some time with world-renowned physicist Carlo Rovelli, Jamie Oliver treats the guests to two Italian dishes, and Simon cooks a cauliflower tikka kebab. Superorganism perform live.
Tim and Simon learn how to handle a tarantula with aquarist Ross Hickles, and try oysters four ways with Katy Davidson. Simon cooks caramel whoopie pies and Manic Street Preachers perform live.
Tim and Simon get on board with model railway expert Richard Rundle, guest chef Paul Askew cooks scallops with morcilla, lomo and romanesco cous-cous. And Kodaline perform live in the studio.
Tim and Simon learn about dinosaurs with palaeontologist Darren Naish, guest chef Michael Caines cooks monkfish with mussels, and Simon cooks a pork schnitzel burger. Lissie performs live.
Tim and Simon clown around with Mattie Faint, guest chef Judy Joo cooks Korean fried chicken, Simon bakes a flourless chocolate, almond and hazelnut cake, and The Vaccines perform live
Tim and Simon get the lunar lowdown from astronomer Tom Kerss, guest chef Zoe Adjonyoh cooks Ghanaian yam pancakes with scotch bonnet ice cream and George Ezra performs live
Tim and Simon learn about the fascinating world of minibeasts with zoologist Jess French, drinks experts Neil and Joel serve up 3 drinks with a conscience, and Louisa Johnson performs 'Yes' live
Tim and Simon learn about the immune system and meet harp expert Nigel Tree. Guest chef Marcus Samuelsson cooks his grandma's chicken meatballs recipe and Mr Eazi performs live in the studio.
Tim and Simon meet some furry friends from Crufts, and delve in the history of the painter Picasso. Simon cooks churros and an aubergine chilli tamale pie, and 5 Seconds of Summer perform live.
Tim and Simon get crafty with pyrography, guest chef and cronut creator Dominique Ansel makes madeleines, Simon cooks a kale, mushroom and fontina frittata; plus Rudimental and Jess Glynne perform
Tim and Simon pig out on bacon with charcuterer Sean Cannon and chat to para-snowboarder Owen Pick. Simon cooks satay cauliflower and a rhubarb crumble, and Example performs live.