"Sleepwalk" is Ultravox's first single from their fourth album, Vienna, and their first with Midge Ure as frontman. It was Ultravox's first UK Top 30 chart hit, hitting the lofty heights of Number 29. As well as the standard black vinyl, the 7 Inch was released as a limited clear vinyl.
The single's B-side, "Waiting" is a more solemn, bass-laden affair in comparison to the faster synth work of the A-side. It now appears on the CD re-issue of Vienna as a bonus track, as well as various other Ultravox compilations.