"The Coming of... Ka-Zar!"
The X-Men are dispatched to investigate a strange "wild man" and his sabretooth tiger in the antarctic. They find a land lost by time under the ice, where dinosaurs and other dangers roam as a primitive race of humans kidnap Jean. The X-Men need to befriend Ka-Zar and convince him to help them find Jean.
First appearance of Ka-Zar, Zabu and the Savage Land.