"The Greatest American Hero" is a television series that aired from 1981 to 1983. The show follows a high school teacher named Ralph Hinkley, who is given a superhuman suit by extraterrestrial beings. The suit grants him extraordinary powers, but Ralph struggles to master them, leading to comedic situations. The series is known for its catchy theme song, "Believe It or Not," performed by Joey Scarbury. It combines elements of comedy, action, and adventure, and features Ralph's interactions with his FBI partner, Bill Maxwell, as they tackle various challenges and villains while Ralph learns to embrace his newfound abilities.