Actors John Thomson and Natalie Cassidy join host Dara O Briain, Games Expert Ellie Gibson and team captains Steve McNeil and Sam Pamphilon to play five video games: Rampage, Wolfenstein 3D, Sonic The Hedgehog, B.U.T.T.O.N and special endgame Neigh, Neigh, There's No Limits in a bid to become this week's Go 8 Bit Champions.