The Master [Philip Van Allen] (villain, introduction, death); Malay cult (villains, introductions); Black Terror [Bob Benton]; Tim Roland; Mrs. J. Wellington Gibbs; Dr. Croydon; Mr. Gibbs; Jean; Victor Helmont
After a college prank disfigures Van Allen, he decides, years later, to take revenge against those who caused his disfigurement.
Nelson Drew conducts a chemistry lecture at Claflin College---
The Liberator [Dr. Nelson Drew] (introduction, origin); Annabel Evans (introduction); Tommy (introduction); Prof. Forbes (introduction, death); Krause (villain, introduction); Kurt (villain, introduction); Nazi spies (villains, introductions)
Writer credit inferred from the fact the character Annabel Evans shares a first name with Hughes's wife.