<P> Schofield occasionally comments on the difficulty that past contestants have had with a game and notes the average number of lives lost while playing it, in order to help the contestant decide whether to continue or stop . Friends and family members in the audience may offer advice on decision - making and techniques for playing the games . Certain games have specific restrictions added to increase their difficulty, such as a time limit or allowing the use of only one hand . If the contestant violates any such restriction, they immediately lose a life . </P> <P> The contestant is given two forms of assistance, each of which may be used once . "Simplify" reduces the difficulty of a game, such as by allowing more time or increasing the size of a target zone, and may be used after any unsuccessful attempt . The simplification remains in effect until the contestant either completes that game or runs out of lives . "Trial Run" allows the contestant to make one practice attempt at a game with no lives or money at stake, then decide if they want to play or stop . This assistance becomes available after they complete the first game, and can only be used upon the introduction of a new one . </P> <P> The seventh and final game is worth a jackpot of £ 250,000; contestants who complete this game are said to have "beaten the Cube". It is a more difficult version of one of the six games a contestant previously played, and struggled to complete . Only one person has successfully completed the seventh game: runner Mo Farah, who appeared in a special episode of a celebrity series in 2012 that featured British gold medallist athletes as contestants . </P> <P> Objective Productions first approached Channel 4 in 2008 with the format . It was made into a non-televised pilot by the channel, and was hosted by Justin Lee Collins . Channel 4 eventually decided not to commission the show because it would have been too expensive . In February 2009, ITV purchased the rights to the show and filming began during April 2009 at Wembley's Fountain Studios . The Cube is one of the first shows to use the game freeze filming technique on a frequent basis, such as when a contestant jumps in celebration . The technique used is called "time slice". Using specially designed cameras, it allows the viewer to see one side of the Cube before the action is frozen, spun to another face of the Cube and then resumed . Slow - motion shots are again common to show action replays of the task a contestant just completed, or the critical moment of a game, to heighten the excitement of whether the contestant will succeed or fail . The show makes extensive use of CGI to project images onto the walls and ceiling of the Cube, while a screen on the floor is also capable of showing images . These film techniques make the seemingly simple tasks that are put before the contestants seem much more exciting than they would normally be . </P>

What episode of the cube was mo farah on