Cover was born on November 20, 1928, in Cleveland, Ohio, to Britta (Schreck) and Franklin Held Cover. He graduated from John Marshall High School in 1947.[2]
His first starring role was on The Jeffersons as Tom Willis (a Caucasian man) who was married to an African-American woman, Helen, played by Roxie Roker.[1] The couple lived in the same high-rise apartment building as the sitcom's title characters. Cover would often be the foil to Sherman Hemsley's black businessman character, George Jefferson. The sitcom ran from 1975 to 1985. He also appeared in The Stepford Wives in 1975, and played Hubert Humphrey in the 1982 TV movie A Woman Called Golda.
Following the end of The Jeffersons, Cover continued to make guest appearances on television shows as well as appearing in a supporting role in Wall Street (1987). In 1994, he appeared in the second episode of ER. His final television appearance was in an episode of Will & Grace (entitled "Object Of My Rejection") that aired on May 13, 1999.