Ultimate Brain

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.