Sproat is best known for his work on Dark Shadows, the 1960s ABC Daytime gothic soap opera. Sproat created the vampire character Barnabas Collins portrayed by Jonathan Frid, and turned the low-rated show into a huge national success.[4] Sproat worked on the show from October 1966 through January 1969.[5]
In addition to television writing, Sproat penned the play The Dry Season which was performed in 1954 by The Hamilton College Charlatans. He also wrote for musical theatre including Abie's Island Rose and Back Home: The War Brides Musical, both of which ran off Broadway.[7][8] Both shows had lyrics by Sproat's longtime partner, Frank Evans, who died in 2016.[9]