Retro was the only EP (7") by Ultravox, then Ultravox!, released on 10 February 1978. It was the last recording released by the band as Ultravox!. Also this was the last disc featuring original guitarist Stevie Shears, who left the band after its release. In 2006, Island Records re-released the tracks, adding them to remastered versions of Ultravox!'s albums. The tracks from side two of the EP were included on the reissue of Ultravox! and the side one tracks on the reissue of Ha! Ha! Ha!.