A dark-haired actor and singer from the musical stage, Spiner made headway on television in small roles during the late 1970s. After off-Broadway work ranging from "Leave It to Beaver Is Dead" (1979) to "The Sea Gull" (1980), Spiner made it on Broadway in 1978 in "A History of the American Film" and later played two supporting roles in Stephen Sondheim and James Lapine's award-winning musical biography of pointillist painter Georges Seurat, "Sunday in the Park with George" (1984). Later that year, he ventured onto Broadway once again in the adventure-turned-musical, "The Three Musketeers", but