Sea Life curator James Robson talks all things jellyfish. Simon cooks halloumi and feta pastries. Guest chef Anna Haugh makes oat crusted hake with smoked mackerel velouté. Courteeners perform live.
Dr Liz Bruton talks about the Science Museum's Cyber Security Exhibition. Simon cooks the best ever banana cream pie. Guest chef Calum Franklin cooks festive pies. Jack Penate performs live.
A welcome back to film expert Corrina Antrobus. Simon cooks Cajun spice cauliflower. Guest chef Richard Corrigan cooks pigeon and black pudding . Blossoms perform live.
Curator Louise Macfarlane talks to about the Cutty Sark's 150th birthday. Simon cooks pork spring rolls. Guest chef Sophie Michell cooks Tres Leches French Toast. Tones And I performs live.
Meteorologist Simon King chats about weather myths and facts. Simon Rimmer cooks bacon baklava. Guest chef Jack Stein cooks Thai pork buns and apple sauce. Shed Seven perform live.
Film expert Corrina Antrobus joins Tim to talk all about movies. Simon cooks beetroot and feta cakes. Guest chef Johny Gregory-Smith creates Alleppey prawn curry. James Blunt performs live.
Dr Tarek El Awady tells us about Tutankhamun. Simon cooks teriyaki steak skewers. Guest chef Fearne Cotton cooks black bean sausages with mixed root mash. Rick Astley performs live.
Science expert Keith Cooper talks to Tim and Simon about aliens. Simon cooks spicy spaghetti meatballs. Guest chef Asma Khan makes Bengali Fish Curry and Aloo Dum. Editors perform live.
Elly Watson, co-curator of the Mission to Mars exhibition drops in. Simon cooks salmon Thai curry. Guest chef Max Halley cooks a Chinese takeaway sandwich. Keane perform live.
Helen Prestage and rescue dogs from Channel 4's The Dog House join Tim and Simon. Simon cooks chilli beef empanadas. Guest chef Judy Joo cooks green tea monkey bread. The Script perform live.
Professional Latin dancers Lisa Welham and Valerio La Pietra drop in. Simon cooks Piri Piri chicken. Guest chef Mary Sue Milliken cooks seared black cod veracruzana. Wildwood Kin perform live.
Tim and Simon learn about human tissue engineering. Simon cooks lamb rump kebab. Guest chef Jason Atherton cooks pearl barley risotto. Ina Wroldsen and Emeli Sandé perform live.
Snowboarder Aimee Fuller pops in. Simon cooks poached salmon with red wine vinegar and capers. Guest chef Tom Kerridge makes mac and cheese. Little Simz and Dermot Kennedy perform live in the studio.
Tim and Simon learn about The Durham Miners'Association. Simon cooks king prawns with aioli. Guest chef Tom Brown makes smoked haddock mash, wild mushroom and egg yolk. Brittany Howard performs live.
Tim and Simon learn about clouds. Simon cooks charred sweetcorn and cumin tacos. Guest chef Nadiya Hussain makes strawberry milkshake funnel cake. Alice Merton performs live.
Tim and Simon are joined by Team GB Paralympic Champions. Simon cooks duck hash. Guest chef James Golding makes Brock eggs with peas and beans. Gabrielle Aplin performs live.
Tim and Simon learn about Mudlarking with Lara Maiklem. Simon cooks sea bass with Asian slaw. Guest Chef Joe Wicks makes cheese quesadilla. Slaves perform One More Day Won't Hurt live.
Tim and Simon learn about Blackpool illuminations. Simon cooks scallop ceviche with coconut. Guest chef Helen Goh makes rolled pavlova with summer berries. Barns Courtney performs live.
Tim and Simon learn about birds of prey. Simon cooks summer lamb lahmacun. Guest chef Jeremy Pang makes an ancient vermicelli crab curry. Mahalia performs Simmer live in the studio.
Tim and Simon meet historical consultant Greg Jenner. Simon makes a white bean chilli with sausages. Guest chef Harry Lomas makes corn beef hash. Bastille perform live.
Tim and Simon learn about sculpting. Simon makes a chocolate mayonnaise pudding. Guest chef April Jackson cooks honey jerk wings and chunky cassava chips. Kaiser Chiefs and Zara Larsson perform live.
Tim and Simon learn about Drag SOS. Simon makes coconut and strawberry trifle. Angela Hart makes Venetian fish stew. Josh Katz cooks Turkish eggs with Aleppo chilli butter. Craig David performs live.
Tim and Simon learn about Morris dancing. Simon makes lemon and blueberry meringue pie. Guest chef Paul Ainsworth makes buttermilk fried chicken. Leon and Lighthouse Family both perform live.
Tim and Simon learn about Stonehenge. Simon cooks cauliflower fritters and curry mayo. Guest chef Michael Caines makes creamy minced beef with cheesy spuds. Amber Mark performs live.
Tim and Simon learn about the science of sound. Simon cooks chilli aubergines with smoked feta. Guest chef Clodagh McKenna makes raspberry and rosewater pavlova. I See Rivers Perform live.
Tim and Simon meet the director of Diego Maradona. Simon makes hake with sarde and white chocolate and banana blondies. Guest chef Asma Khan makes chicken chaap with parathas. Hamzaa performs live.
Tim and Simon learn about the book Our Universe. Simon makes smoked haddock and avocado pâté. Guest chef Masha Rener cooks pasta alla Norcina. Dodie performs live.
Guest chef Nisha Katona cooks broccoli and onion bhajis, while Jack Sturgess cooks chargrilled sea bass with vanilla vinaigrette. Karina Elias shares some Spanish wines. And Mabel performs live.
Tim and Simon learn all about coral. Simon cooks a tiropita and a strawberry and elderflower fool. Guest chef John Gregory-Smith makes beef skewers. Mini Mansions perform live.
Tim and Simon learn about Van Gogh. Simon makes chilli cheese flatbreads. Guest chef Sophie Michell cooks slow roasted pork tacos with watermelon pico de gallo. The Amazons perform live.
Tim and Simon learn about the science of fate. Simon makes a cauliflower biryani salad. Guest chef Paul Askew makes bruschetta with asparagus and potted shrimps. Self Esteem performs live.
Tim and Simon learn about the history of writing. Simon makes a beef and pickled onion sausage roll. Guest chef Angellica Bell makes a Caribbean chicken curry. Robinson performs live.
Tim and Simon learn about prosthetic makeup. Simon makes salted caramel and chocolate doughnut bread and butter pudding. Guest chef Tom Brown cooks monkfish, while Ten Tonnes perform live.
Rodrigo Y Gabriela perform for Tim and Simon. Simon makes blueberry and bacon scones and a bonet for pudding. Guest Chef Omar Allibhoy cooks paella de marisco. Bear's Den perform live.
Tim and Simon learn about Brazillian jiu-jitsu. Simon cooks lamb and yoghurt soup and a banana and chocolate tart. Guest chef José Pizarro makes Iberian pork burgers. Becky Hill performs live.
Tim and Simon learn all about bells. Simon makes sour curry with prawns and sweet Yorkshire puddings. Guest chef Theo Randall cooks beef sirloin with fritto misto. Lewis Capaldi performs live.
Tim and Simon meet the folk band Fisherman's Friends. Simon cooks Sri Lankan style mussels. Guest chef Sophie Michell makes a blood orange meringue tart. Circa Waves perform live.
Tim and Simon learn about gene eating. Simon makes smoked mackerel panzanella. The Galvin Brothers make cured salmon with crab, fennel and avocado cream. Maverick Sabre and Jorja Smith perform live.
Tim and Simon learn how to Irish dance. Simon makes vegan peanut butter breakfast pancakes with coconut 'bacon'. Guest chef Clodagh McKenna cooks soda breaded pork chops. John Newman performs live.
Tim and Simon learn about stained glass. Simon makes a tomato and okra salad and a tropical loaf. Guest chef James Martin cooks deep-fried plaice with brown crab mayo and lemon. Dido performs live.
Tim and Simon meet some Crufts dogs. Simon makes a coastal prawn curry and an Anzac caramel bake. Guest chef Tom Kerridge cooks chicken and pearl barley soup, while Grace Carter performs live.
Tim and Simon learn about the history of lighthouses. Simon makes an old school chocolate fudge cake. Guest chef Jeremy Pang makes Chongqing chicken in lettuce wraps. Sam Fender performs live.
Tim and Simon learn about t'ai chi. Simon makes a burnt sweet potato salad and rugelach, while guest chef Jack Stein cooks Welsh rarebit. Freya Ridings performs live in the studio.