Who is Ralph Hinkley ?

I know one Ralph Hinkley was The Greatest American Hero - character played by William Katt

What was his day job ?

And for even more bonus points - what did his last name change to after Hinkley....and why!?

# The main character's last name was changed during the series run, from Hinkley to Hanley, because of the name's negative connection with John Hinckley's attempt on the life of Ronald Reagan. However, when the "Greatest American Heroine" pilot was produced in 1986, Ralph's name was back to being Hinckley. Ironically, the pilot includes a scene in which Hinckley meets the President - who, in 1986, was still Reagan.

# Ralph's name was changed back to Hinkley during the second season after the furor over his last name died down. - The Internet Movie Database