My personal favorite Namor villain is introduced…Tiger Shark!
Todd Arliss is a swimmer with a spinal cord injury who seeks healing assistance from Dr. Dorcas, who also happens to be a mad scientist who has kidnapped Sub-Mariner. Dorcas injects Arliss with tiger shark DNA, which somehow heals his broken back and gives him super strength. Tiger kidnaps Lady Dorma, who seems to only serve as a hostage in all these Roy Thomas Namor stories, and then takes over Atlantis. I have to say, Atlantis is a pretty lame city. They seem to be kicked around by…Everyone.
In the end, Namor beats up Tiger Shark and reclaims his throne as Prince of Atlantis.
Creators: Roy Thomas and John Buscema
First appearance: Tiger Shark
Grade: B-. Way above average for a Namor comic, but only somewhat above average compared to other books you could have read in 1968.
For the complete history of the MU, year by year, go here.
Tiger Shark!, Namor