Character mistake: When Uncle Ned calls Alcoholics Anonymous, he only dials 6 digits on the phone (instead of 7), but still the call successfully goes through.
Continuity mistake: When Alex tells Jennifer to play her clarinet outside Jennifer complains that its dark out, but you can see through the window that it is bright out. When they show it again it is dark.
Chosen answer: Steven Keaton (Michael Gross) did not grow the beard for an episode. He grew it between season 1 and season 2 as a character he was playing in an Off-Broadway play. When the show began taping for season 2, it was decided to have him keep it. It never was a plot point on the show.
jairodrigue