Protheroe's opportunity to record music was tied into his acting career -- he was playing a pop star in a play, which in a roundabout way lead to his Chrysalis contract -- but he started playing music prior to acting. As a child in Salisbury, Wiltshire, he sang in the local church choir and learned how to play piano and guitar. At the age of 17, he started singing in a local rock band while also acting in the amateur theater group The Studio Theatre. A couple years down the road, he played in Folk Blues Incorporated, which relocated to London in 1965, where Protheroe began playing in folk clubs. A year later, he started to pursue an acting career, hopping from theater company to theater company, settling with a troupe called Lincoln in 1968. There he met Martin Duncan, who became a collaborator for the next few years.
Work remained steady for Protheroe over the next five years and he began to make inroads on television -- he appeared on the TV series Frontier in 1968 and The Rivals of Sherlock Holmes in 1973 -- but his breakthrough wound up being in the thriller Death on Demand, where he played a pop star. The author of the play had a lyric for Protheroe to set to music and, impressed with the results, the writer shopped the song around. Chrysalis asked for originals and, liking "Pinball," signed Protheroe.
"Pinball" was released as a single in 1974, debuting at 40 on the charts on its way to an eventual peak of 22. His debut album, also called Pinball, appeared later in 1974. The following year saw the release of Pick Up, which was then followed by I You in 1976. As he was pursuing a career as a pop star, Protheroe didn't expend as much energy in acting but in 1976, things started to shift back toward acting, as he wound up getting a role in the London production of the rock musical Leave Him to Heaven, for which he received good notices.
Chrysalis and Protheroe parted ways after 1976, and he returned to acting full-time. He had an appearance in Richard Donner's 1978 Superman film but, for the most part, Protheroe was a mainstay of BBC productions and British stage. From this point on, he acted steadily, doing anything from Shakespeare to spy thrillers.
In 1997, there started to be signs of a resurgence of interest in his '70s music, as the Basta label put out a set called Brian's Big Box. In 2005, Protheroe assembled unheard material, including new songs, for the CitySong collection. The next year saw the release of Pinball and Other Stories, a compilation of his '70s material that also had a handful of unheard '80s originals to round out the disc. ~ Stephen Thomas Erlewine, Rovi