Trivia time, RK:
In Greatest American Hero, what was the main characters name and why did they switch to calling him “Mr. H” in later seasons?
As previously mentioned, the main character's name was originally Ralph Hinkley, but after the assassination attempt of Ronald Reagan by John Hinckley, Jr. on March 30, 1981 (only 12 days after the pilot episode aired), the character's last name was amended to "Hanley" for the Season 1 episode "Reseda Rose". For the rest of the 1st season, he was either "Ralph" or "Mister H". During the episode aired the night of the assassination attempt, the sound of a jet airplane was used to dub over the last name being spoken, and in subsequent episodes there was overdubbing of his students calling him "Mr. H" instead of "Mr. Hinkley." In the episode where Ralph is given a promotion and his own (tiny) office space, we see the name "Ralph Hanley" on the door plaque. At the start of the 2nd season the name had changed back to Hinkley.