It was the successor to Colour Me Pop and the precursor of The Old Grey Whistle Test.
The earliest programmes were billed as Line Up's Disco 2, the programme – like Colour Me Pop before it – originally being a spin-off of Late Night Line-Up.
[2] The regular presenter of the first series was Tommy Vance, who was replaced for the second series by Pete Drummond;[1] other presenters used occasionally included Mike Harding, Richard Williams and Mike Raven.
The theme music was initially by Elton John.
[1] This was later replaced with the opening riff of Led Zeppelin's "Moby Dick".