Doctor Farrell is a scientist who apparently works with Don Vizioso in dissecting and experimenting on mutants. Vizioso mentions Farrell twice in Mutant Gangland, but Farrell is not seen. In the first mention he uses the full title "Doctor" and in the second mention he abbreviates this to "Doc".
- Farrell's name and job description (including the experimentation and dissection of mutants) are strikingly similar to Doc Feral, a character from Teenage Mutant Ninja Turtles & Other Strangeness. (Additionally, many speakers of North American English pronounce "Farrell" and "Feral" exactly the same way according to the Mary–marry–merry merger.)
- Previously on the 2012 TV series, Dr. Victor Falco also bore many strong similarities to the original Feral, including an unethical experimentation on mutants, experimentation with telepathy, and recruiting giant mutant rats as servants.