Norman Lear's shows were being produced at Metromedia Square in Hollywood, but there was inadequate space for this show, so they rented studio space from KTLA. The KTLA studio was across Fernwood Street, so they started calling KTLA "Fernwood", which then became the name of the fictitious town where the show is set.
Then Nixon aide Ben Stein wrote an impassioned letter in support of the show early in the first season, when its future was strongly in doubt; his piece is considered at least one of the reasons it continued airing.
Actor Martin Mull, in an interview on comedian Norm MacDonald's web-based show, NormLive, stated he came in and was interviewed for an hour by Norman Lear to be a writer on the show and at the end Lear thanked him and said they didn't need any writers. Six months later he was telephoned and asked to come in and read for a part, stating he was not an actor.