Star of Hetty Feather, Polly Allen, takes on five missions in the home of one of her biggest fans. Millie Innes of Millie Inbetween surprises a member of the studio audience. Show more

Rak-Su take on Sam and Mark in the most physically demanding Face Off yet! YouTube superstar Tiana surprises one of her biggest fans in the studio. Show more

Join Sam and Mark for hilarious pranks, brand new games and festive surprises. Guests include Kimberly Wyatt and Hacker T Dog. Show more

Art Ninja Ricky Martin goes In Yer House to carry out a secret mission. Lindsey Russell surprises a superfan in the studio, plus there’s music from Madagascar: The Musical! Show more

Sam and Mark present another show packed full of surprises and pranks. The Voice winner Kevin Simm performs in the studio. Show more

When someone forgets to book the studio audience, Sam and Mark are left with time on their hands to reminisce over some of the highlights of the current series. Show more

HRVY makes a surprise appearance, giving a superfan the surprise of her life! Stars of Operation Ouch, the van Tulleken twins, go undercover in a viewer’s house. Show more

Sam and Mark take their hidden cameras on the road to prank some viewers in Wales and one family take home the ultimate money-can't-buy prize. With music from Oh My! Show more

Sam and Mark take their hidden cameras on the road to prank some viewers in Yorkshire and one family take home the ultimate money-can't-buy prize. Show more

The Saturdays join Sam and Mark in the studio to perform two of their biggest hits. Plus one family in the audience takes home the ultimate money-can't-buy prize. Show more

Someone gets a chance to win some prizes that are out of this world! Bars and Melody take questions and selfies from the audience and there’s music from Samantha Harvey. Show more

Sam and Mark are stuck in the toilet. A chance to remember some of the best moments from this series. Show more

Shelby Bain, who plays Amy in The Next Step, joins the boys to surprise a superfan in the studio. Celebrity MasterChef winner Angellica Bell is the Celeb of Doom. Show more

Sam and Mark get the party started with their special guest Loick Essien, who performs Me Without You in a show full of pranks and wind-ups. Show more

Sam and Mark get the party started with their special guest Ronan Parke and 'Magician Impossible' Dynamo drops by to bamboozle the audience. Show more

Boy band New Hope Club surprise two of their biggest fans in the studio. Blue Peter's Radzi takes on the role of secret agent and goes 'In Yer House'. Show more

Stars of The Dumping Ground join the boys to surprise their fans in the studio and Naomi Wilkinson has a total disaster in this week’s In Yer House. Show more

Sam and Mark get the party started with their special guest Stacey Solomon and music from Rizzle Kicks and three kids get an access all areas tour of CBBC. Show more

Sam and Mark take their hidden cameras to Liverpool to wind up a couple of fans. Two audience members get to play a game with boyband The Mend. Show more

Sam Nixon and Mark Rhodes host and Bars and Melody join in the fun. CBBC's Lauren Layfield goes on the Wind-Up wheel. The guys travel to Watford. Show more