Danno was from Hawaii, attended college in Hawaii for one year, majoring in psychology, and transferred to USC Berkeley, and majored in police science.
The character John Auston is a Lance Corporal in the Marines. Even though he has one stripe, it's the rifle under the stripe that makes the rank
The title is derived from the children game "King of the Hill" where the object of which is to stay on top of a large hill or pile as the "King of the Hill" while other players attempt to knock the King off the pile and take their place.