In the 1960s, the original Dr. Frankenstein's great-grandson left Germany and visited the Munsters, bringing Johann (one of the original Dr. Frankenstein's mistrials) to meet Herman. He is pretty good with hypnosis and telepathy, sometimes long distance, using it to summon Johann.

Resides in: Germany
Abilities: telepathy and hypnosis

Dr. Viktor Frankenstein IV has been played by:
John Abbott ("The Munsters" episode 64, 1966)