Arriving at the airplane factory, the Iron Skull...
Iron Skull; Moose; Chuck Lemerise; Al Avison; Professor Edmunds; Peep Eckley (guide)
Moose quits Avison's employ and assist Iron Skull in pursuing Avison's gang to Peru to prevent them from raiding an Incan site. Avison tries to rile up natives into killing Iron Skull but his invulnerable body causes the natives to take him for a god.
After a gorilla murders 22 people in a scheme inspired by Poe's 'Murders in the Rue Morgue,' Dr. Hypno places his mind inside another gorilla in order to capture the killer animal. The first gorilla had been set free by Scotty, who commits suicide.
The Shark; Eric (gunman); Father Neptune; Joe Shapiro (also as Jean Vigee-Le Brun)
Using his new ability to walk on water the Shark battles a birdman. The birdman reveals himself to be scientist Jean Vigee-Le Brun, who shares his formula with the Shark. Then Eric kills Jean. Then Eric reveals Jean is actually his boss Joe Shapiro and isn't dead. Then Joe explains he hypnotized the Shark and virtually everything he saw was a trick.
We know that this knife was carved from pure gold...
Reef Kinkaid; Dr. Lang; Marian Lang; Kobo (jungle guide); Alligator-Men (costumed men); Torrga
Reef and his friends return to the jungles of Brazil to learn where a golden knife originated from. They discover men dressed as alligators who try to sacrifice Marian to a pit of alligators. Reef saves Marian and they find a huge deposit of gold.