The youngest Walton son Jim-Bob, played by David W. Harper, is mysteriously absent from The Substitute (1973).
Catherine Burns co-starred with Richard Thomas in the 1969 feature film Last Summer, for which she was Oscar nominated as Best Supporting Actress.
When Miss Pollard (Catherine Burns) is writing her name on the blackboard, she had just finished the downstroke of the capital P when the chalk breaks. But in the closeup, the downstroke isn't there.
Catherine Burns and Richard Thomas had also starred together prior to this in Red Sky at Morning.
While packing her suitcase, Megan tells John-Boy that her father was always quoting Emerson, Ruskin and Montaigne. She is referring to philosophers Ralph Waldo Emerson (1803-1882), John Ruskin (1819-1900) and Michel de Montaigne (1533-1592).