This episode was the first of the series to be produced by Paramount Television.
When Joe pays a visit to Edna Reston, the green sofa in her living room was used in an earlier episode.
The alias Wickersham uses in this episode is a nod to Richard Feynman, the famous physicist who is often referred to on the sitcom Big Bang Theory.
This is the first two-parter of the series; the second being Race Against Time: Part 1 (1974) and the third being Bird of Prey: Part 1 (1975).