Here's another image of the infamous Doc Terror from an unreleased update to the Go Get 'em Comics Multiverse Handbook. This is Doc T's original costume which he wore from 1938 - 1974. There is some debate over whether the person claiming to be Doc Terror during these years was in fact the same person or multiple individuals using the same guise. As of yet Doc Terror has not confirmed nor denied the existence of alternate versions of himself.
Don't forget to make an appointment with Doc Terror's Secretary! She may not have a head on her shoulders but she's got one for numbers!