Hey, It's That Guy!: Gary Coleman appeared in an episode aired just before Diff'rent Strokes premired. Needless to say, CBS promoted the episode heavily when it was rerun.
Hey, It's That Voice!: The theme song was sung by Ja'net DuBois, who also starred in Good Times, another Norman Lear project.
The Other Darrin: Lionel was played by Mike Evans in season 1, then by Damon Evans in seasons 2-4, then by Mike Evans again for the rest of the series.
