The voice used by Pat Fraley for several of the Invertroids would be used by him again for the character of Thunder Stick in Filmation's BraveStarr (1987), also using the same inflections.
The noises made by Eddie Spenser Jr. as he is being pulled into the mirror sound exactly like Brat-A-Rat, who is also voiced by Peter Cullen.
The establishing shot of the skyscraper the first victim lives in uses the same background as the plate of the two building that flank Ghost Command, only this time it is shown in reverse and the foreground buildings have been positioned to cover Ghost Command.