The Greatest American Hero is an American comedy-drama television series. It was shown for three seasons from 1981 to 1983 on ABC. It was created by producer Stephen J. Cannell. It premiered as a two-hour television pilot on March 18, 1981. The series features William Katt as teacher Ralph Hinkley. It also starred Robert Culp as FBI agent Bill Maxwell, and Connie Sellecca as lawyer Pam Davidson.