In this episode we finally get to see the inside of the Men's room, when Harris and a citizen have a talk in private.
In Season 3, Episode 20, in the episode entitled Group Home (1977) also dealt with the topic of bacteria released "into the wild".
DNA Story episode guest star A Martinez and Barney Miller series co-star Max Gail later co-starred together on the series Whiz Kids (1983).
In this installment of the show, a woman is convinced that her husband is really a clone or imposter. In therapeutic circle, the disorder is known as the Capgras delusion.