Episode Number: 2c
Season Episode Number: 2c
Voices: John Vernon (Namor), Peg Dixson (Lady Dorma), Bernard Cowan (Narrator), (Krang), (Seaweed Monster), (Ancient Atlantian), (Atlantian Bystanders), (Officer).
Plot: In order to gain the next clue to the whereabouts of Neptune's Trident, Namor must face a giant seaweed monster!
Review (Warning! Spoilers!): This third chapter is taken from the end of Tales to Astonish #71 and the beginning of Tales to Astonish #72. The story doesn't wrap up at the end of the episode like the other episodes of The Marvel Super Heroes that we've seen so far. Namor doesn't find the trident or reclaim his throne, he goes off at the end of this episode and will continue his journey in the next episode.
This is fairly significant because most shows from this era don't have multi-episode storyarcs. Serial cartoons didn't really come into popularity until the 80s, although there are plenty of exceptions, like Rocky & Bullwinkle.
The visuals in the Sub-Mariner segment are really much better than the other segments of The Marvel Super Heroes. This is largely due to the fantastic art of Adam Austen, who is actually Gene Colan working under a pseudonym. Colan, along with his contemporaries Kirky, Ditko and Heck, defined the Silver Age of Marvel Comics.