knees during a show in Croydon, London. As a result, Proby was banned in every major theatre in Britain, plus appearing on the BBC and ITV television channels. The incident scandalised the British press and public, causing Proby's career to lose momentum. Minor hits in 1966 were followed by flops, and in March 1968, "It's Your Day Today", gave Proby his last UK chart entry for nearly 30 years. In 1967 Proby scored his only Billboard Hot 100 top forty hit with "Niki Hoeky". In September 1968, he recorded Three Week Hero, released in 1969. A collection of country-style ballads mixed with blues, it used the New Yardbirds, later to become Led Zeppelin, as the backing band. The album was produced by Steve Rowland. 1970s–1980s In 1971, he appeared as Cassio in a rock musical of Shakespeare's Othello, Catch My Soul. He performed in cabaret and nightclubs, singing 1960s ballads and rhythm and blues. In 1977, he appeared as a contestant on the UK television talent show Opportunity Knocks. He wore an eye-mask and was billed as "The Masked Singer". Signing with Good again that year, he portrayed Elvis in Elvis – The Musical but was fired for ignoring the script and talking to the audience. Later in 1977, Proby agreed to record lead vocals on some tracks by Dutch progressive rock band Focus that were released on Focus con Proby, their final album before the group disbanded in the following year. In the 1980s, writers David Britton and Michael Butterworth attempted to revive Proby's career. The pair got the singer to record covers of various songs for their label Savoy Records, including "Tainted Love" by Gloria Jones, "Love Will Tear Us Apart" by Joy Division, "Anarchy in the UK" by The Sex Pistols, "Sign o' the Times" by Prince, and "In the Air Tonight" by Phil Collins. The project failed; Britton recalled Proby "hated everything we ever did" and only wanted to sing "country stuff and ballads, the old-fashioned kitschy stuff." In 1987, his Savoy Records single "M97002 Hardcore" credited Madonna as "Second Vocal (Special Guest)", although this was untrue. 1990s In the early 1990s Proby released an EP, "Stage of Fools", and an album, Thanks. They were issued by J'ace Records, distributed by BMG. Granada TV featured Proby in a documentary. In the early 1990s, Proby reappeared on stage as himself in the musical Good Rockin' Tonight, followed