In each round, the teams are presented with a lineup of people who all claim to have a particular unusual trait or skill (e.g. being able to hold their breath underwater for more than five minutes), but only one of them is telling the truth.

At the end of the round, each team may make one guess as to which one is the "Odd One In," receiving one point for a correct choice.

During the first series, the members in one section of the audience are given keypads on which to lock in their guesses as to the Odd One In.

After the penultimate lineup has been played, the high scorer is invited to compete for a £5,000 cash prize by correctly spotting the final Odd One In, with help from the two teams and the rest of the audience.

The coloured backgrounds denote the result of each of the shows: Episode viewing figures from BARB.