The Mighty Thor - "Trapped by Loki"

After years of imprisonment in Asgard, Loki escapes to Earth to gain his revenge on his half-brother, Thor.

The Marvel Super Heroes is an American animated television series starring five comic book superheroes from Marvel Comics. The first TV series based on Marvel characters, it debuted in syndication on American television in 1966.

The series had limited animation produced via xerography, consisting of edited images from the comics. Generally, the only movement involved the lips when a character spoke, the eyes, and the occasional arm or leg, or a fully animated black silhouette. The series used the original stories largely in their entirety, showcasing Jack Kirby, Steve Ditko and Don Heck art, among others, from the Silver Age of Comic Books.