Della is not in this episode. Perry tells Gertie she is visiting her aunt.
The actor Tenen Holtz made his last appearance in movies and television in this role of Otto Joseph, who ironically is murdered at the onset of this telecast.
Towne's nonretraction of his libelous statement against Carey kept the slander case alive, and it could still go on despite Towne's death. Carey could still sue Towne's estate and the TV station (assuming that the station did not issue a retraction) for slander because of both Towne's original statement and the additional allegations made in the non-retraction.
One of the few cases where the bailiff calls the session to order (including a lengthy recitation and directing everyone to face flag) and identifies the judge. It's also one of the few cases where the judge explains the preliminary hearing requirement, and where Perry waives the preliminary hearing on behalf of his client and requests a jury trial.
A potentiometer is actually a simple and basic electronic device, it is a type of switch, a variable resister, used frequently to adjust the brightness of lighting. In a car, the switches that adjust the brightness of the dash lights and adjust the speed of the wipers are potentiometers.