Season 8 - Episode Guide

Join Sam and Mark for more hilarious pranks and festive surprises. There are brand new games and fantastic guests, including Kimberly Wyatt and Hacker T Dog.

HRVY makes a surprise appearance to give a superfan the surprise of her life! Stars of Operation Ouch the van Tulleken twins go undercover in a viewer's house to carry out secret medical missions. There's a game of Karasoake, and Ben Shires takes questions and selfies from the audience.

Star of Strictly Come Dancing AJ Pritchard gives one girl the surprise of her life in the studio. Two stars of Coronation Street go head to head with Sam and Mark in Face Off.

Art Ninja Ricky Martin goes In Yer House to carry out a secret mission.

Boyband New Hope Club surprise two of their biggest fans in the studio and play their latest hit. Blue Peter's Chinyanganya takes on the role of secret agent and goes In Yer House.

Sam Nixon and Mark Rhodes introduce a lively mix of hidden-camera pranks, special guests and surprises.

Rak-Su take on Sam and Mark in the most physically demanding Face Off yet.

Stars from Hetty Feather and Millie Inbetween surprise some of their biggest fans.