Green Team: Aleena, Connor and Liz from Birmingham Yellow Team: Ella, Zachariya and Gabe from Roath Celebrity (Blue) Team: Sam Nixon and Mark Rhodes from Sam & Mark's Big Friday Wind-Up and Naomi Wilkinson from Naomi's Nightmares of Nature
Green Team: Abi, Ellie and Jack from Bristol Yellow Team: Dali, Poppy and Sophie from London Celebrity (Blue) Team: Kia Pegg, Amy-Leigh Hickman and Joe Maw from The Dumping Ground
Celebrity Team: Khalil Madovi, Akai Osei and Ruby Morgan from 4 O'Clock Club
Celebrity Team: Shannon Flynn, Richard Wisker and George Sear from Friday Download
Celebrity Team: Toby Murray – Rest of team unknown from Dani's Castle
Celebrity Team: Bobby Lockwood, Louisa Connolly-Burnham and Kedar Williams-Stirling from Wolfblood
Celebrity Team: Nick James, Jayden Jean-Paul Denis and Chloe Wong from Hank Zipzer
Celebrity Team: Sam Fletcher, Kelly-Anne Lyons and Marvyn Dickinson from DNN
Celebrity Team: Ted Robbins, Ian Kirkby and Scarlet Hazeldine from The Slammer
Compilation episode. Dr. Brain looks back at some of the craziest scientific challenges from the series.
Celebrity Team: Iain Stirling, Chris Johnson and Ed Petrie from All Over the Place
Celebrity Team: Barney Harwood, Radzi Chinyanganya and Lindsey Russell From Blue Peter
Celebrity Team: April Hughes, Jordan Loughran and Kerry Boyne from Dixi
Celebrity Team: Cleo Demetriou, Sophia Dall'Aglio and Ameerah Falzon-Ojo from So Awkward
Celebrity Team: Stevi Ritchie, Betsy-Blue English and Parisa Tarjomani from The X Factor
Celebrity Team: Molly Rainford, Leondre Devries and Charlie Lenehan from Friday Download
Celebrity Team: Leah Boleto, Hayley Hassall and Ricky Boleto from Newsround
Celebrity Team: Stacey Dooley, Robert Keene and Jasmine McAteer from Show Me What You're Made Of
Celebrity Team: Ben Shires, Haruka Kuroda and Stephen "Sizzling Steve" Kish from Officially Amazing
Celebrity Team: Eubha Akilade, Ben Cartwright and Oliver Woollford from Eve
Celebrity Team: Tyler West, Rachel Stringer and John Farnworth from Match of the Day Kickabout
Celebrity Team: Matilda Ramsay, Jack Ramsay, and Holly Ramsay from Matilda and the Ramsay Bunch
Celebrity Team: Daniel Kerr, Grace McIntosh and Jade Alleyne from 4 O'Clock Club
Celebrity Team: Gabrielle Green, Shorelle Hepkin and Rachel Teate from Wolfblood
Celebrity Team: Ella Gilling from The Next Step, Isabel Clifton from Hetty Feather and Millie Innes from Millie Inbetween
Celebrity Team: Karim Zeroual, Katie Thistleton and Lauren Layfield from CBBC HQ
Celebrity Team: Frankie Vu and Marcus Bronzy from Technobabble and Harvey Cantwell from Friday Download
Celebrity Team: Inel Tomlinson and Johnny Cochrane from Junior Vets on Call and Ashleigh and Pudsey
Celebrity Team: Jamie Flatters, Archie Lyndhurst and Charlie Nicholson from So Awkward
Celebrity Team: Laura Mandeville from Whoops I Missed the Bus and Amelia and Grace Mandeville from The Mandeville Sisters