When Cerberus is in the phone booth calling Mary Dalton and he sets the phone down on the tape recorder, there's a small black disc attached to the speaking portion of the phone. In a later shot of the same scene, the disc is gone.
Greg Mullavey's name on the show is Cerberus. It is spelled as Cerebus in the closing credits.
The doc is shown driving his '68 Cadillac DeVille convertible on the highway. The next clip is to show him tuning or turning on the car radio. The radio shown is from a Ford product. The '68 Cadillac radio has both the volume and tuning adjustments to the left of the dial.
One of Dr. Fowler's patients is a young boy with a brain tumor. Dr. Fowler is a psychiatrist and treating someone with a brain tumor would be outside of his expertise. The boy would normally be treated by a neurologist or an oncologist.