Coates played a strong-willed Lois Lane in the first twenty-six episodes of Adventures of Superman, in which she was given equal billing with George Reeves (insisted upon by Reeves), even for episodes in which she did not appear. Her powerful "damsel in distress" scream was used to good effect in several episodes. After shooting wrapped on the first season, the Superman producers suspended production until they found a national sponsor. When in 1953 it was possible to film more Superman episodes, Coates was already committed to another series, so Noel Neill, who had played Lois Lane in two Columbia Superman serials, in 1948 and 1950, replaced Coates. With the death of Noel Neill on July 3, 2016, Coates is now the last surviving cast member from the Adventures of Superman TV series.