The Greatest American Hero is an American comedy-drama television series that aired for three seasons from 1981 to 1983 on ABC. Created by producer Stephen J. Cannell, it premiered as a two-hour pilot movie on March 18, 1981. The series features William Katt as teacher Ralph Hinkley ("Hanley" for the latter part of the first season), Robert Culp as FBI agent Bill Maxwell, and Connie Sellecca as lawyer Pam Davidson.