The 2000-2001 featured a new format involving 2 groups of 8 who played each other twice for 14 games.

This is a return to the station's roots, as it featured such a format throughout the 1990s and until 2002.

Season 4 featured a new format and was known as "Big Mother".

The series two grand final featured a slightly different format.

Season 5 featured a new producer and a new format.

The European edition now features a new, lighter format for its first 90 continuous minutes.

The tournament was the second to feature a 24-team format.

This version features a unique format, not drawn from any other show.

The station featured an adult contemporary format under the name "Mix 106".

This season of the The Challenge features a new format.