The game was split into four rounds as well as the final "Great Wall" (known as "Mega Wall" in the first series). The first round was "
Solo Wall" which saw each team's two guest players take a turn to face a wall just on their own. For each wall, 10 points were given to the player for a pass while a fail could be given up to 5 points depending on the host's whim. Next was the "'''Captain's Challenge
" or "Captain's Mate'''" which could be one of a number of games: •
Doubles – The captain and a chosen teammate of his choosing (usually, the one they are encouraged to do so by the studio audience) both attempt a wall. A maximum of 20 points was on offer. •
Props – The captain must complete the wall with a prop. This round made its first appearance when Anton Du Beke successfully cleared a wall on a space hopper. •
Mirror Wall – The captain must attempt a wall backwards (facing the swimming pool) leaving his two teammates communicate to him about the shape he needs to make. •
Blind Wall – The captain is blindfolded and his team members have to instruct to him the shape he needs to make. The third round was "
Mystery Guest or Killer Question", the team leading being offered the choice of which game they wished to play and the currently losing team playing the other challenge. A maximum of 20 points was on offer. •
Killer Question – Two players face a wall without cut-outs with a question written at the top and two answers marked as doors. The "door" with the correct answer on it is perforated on the reverse side and so gives way. The players must pass through the correct door. •
Mystery Guest – One of the team attempts a wall with a mystery guest (or several). The fourth round was the "
Team Wall". All three players face the wall with a maximum of 30 points on offer. The programme's finale was the "
Mega Wall". The leading team got to choose to attempt the wall or nominate the opposition. All three players on the team attempt the wall, which travels at double speed – if they clear the wall, they win the show (and the £10,000 to donate to a charity of their choice), while if they fail, the opposing team wins the £10,000. Hole in the Wall used a specialised crane made by Street Crane Company of
Chapel-en-le-Frith to move the wall.
Series 2 changes Series 2, which started on 26 September 2009, contains all new challenges.
Solo Wall now only featured one guest attempting a wall instead of two. The Captain's Challenge was replaced with '''Captain's Mate
in which the teammate who did not attempt solo wall stands in the play area with his or her captain (sometimes one person is blindfolded). Team Wall
returned. Killer Question was now named Wonder Wall
(with both teams now playing it as opposed to just one team). A new challenge named Anton's Twist''' debuted. Which followed some of the following twists: • 3 Monkeys (One won't be able to hear, one won't be able to see, one won't be able to speak) • All team members (In Episode 5, It Was 2) joined together • Head to Head • Mimic team member • No Hole Wall (The shape will be on the screen on top of the wall, the player will try to match this shape) • Pelting with dodgeballs from the other team • Mystery Guest • Jigsaw Wall • Mirror the audience • Balloons • Props • Building Blocks The Mega Wall was renamed the
Great Wall. '''Anton's Twist''', according to Anton, involved walls he'd invented with a twist. Variations could be any number players with various twists (such as placing leg braces around the legs of team members commonly used in
three-legged races), or the appearance of a mystery guest. Notably, one episode had Anton announce a mystery guest for Joe Swash's team, and Joe asked, "Is it my mum?" It turned out it was his mother, but the two failed the wall (although they still scored points for the team). ==Production==