The Greatest American Hero is an American comedy-drama superhero television series. It premiered as a two-hour pilot movie on March 18, 1981, and ran until February 2, 1983. The series chronicles Ralph's adventures after a group of aliens gives him a suit that grants him superhuman abilities. The lead character's surname was changed from "Hinkley" to "Hanley" for the latter part of the first season.
Ralph Hinkley (Katt) is a Los Angeles teacher of remedial education high school students. During a school field trip, he encounters extraterrestrials who give him a suit which endows him with superhuman abilities. Ralph's uniform grants him the powers of flight, super strength, invulnerability, invisibility, precognition, telekinesis, X-ray vision, super speed, shrinking, psychometry and even the ability to detect the supernatural.