| Issue | #4 |
| Published | December 1971 |
| Cover Price | 0.25 USD |
| Pages | 52 |
| Editing | Stan Lee |
| Characters | Thor |
| Genre | Superhero |
| Pencils | Jack Kirby |
| Inks | Vince Colletta |
| Reprinted | from Thor (Marvel, 1966 series) #131 (August 1966) [original title: "They Strike From Space!" |
| Characters | Thor; Hercules; Ares; Jane Foster; Tana Nile; Odin; Rigel Colonizers (I) |
| Synopsis | 1st app of Rigel and Colonizers in Thor. Tana Nile stakes a claim on Earth. Thor starts to fight towards Rigel to rescue Earth. |
| Genre | Superhero |
| Script | Stan Lee |
| Pencils | Jack Kirby |
| Inks | Vince Colletta |
| Letters | Artie Simek |
| Notes | First appearances of the planet Rigel and Rigel Colonizers. |
| Reprinted | from Thor (Marvel, 1966 series) #131 (August 1966) |
| Characters | Thor; Tana Nile; Indestructible (I); Grand Commissioner of Rigel (I); Jane Foster; Sir Porga of Wundagore (named in the next issue) (I); Recorder (I); Ego (I) |
| Synopsis | Thor, battling to Rigel, is diverted by the menace of Ego. |
| Genre | Superhero |
| Script | Stan Lee |
| Pencils | Jack Kirby |
| Inks | Vince Colletta |
| Letters | Sam Rosen |
| Notes | The first appearances of the Grand Commissioner of Rigel, Indestructible, Sir Porga of Wundagore, the Recorder and Ego. |
| Reprinted | from Thor (Marvel, 1966 series) #132 (September 1966) |
| Characters | Thor (guest star); Loki (origin); Uller (I); Volsak (I) |
| Synopsis | Thor defends Loki after Loki is caught engaging in mystical mischief. |
| Genre | Superhero; Fantasy |
| Script | Stan Lee |
| Pencils | Jack Kirby |
| Inks | Vince Colletta |
| Letters | Artie Simek |
| Notes | Part 2 of Loki's origin. Second biographical Loki story, the first appearances of Uller and Volsak. |
| Reprinted | from Journey Into Mystery (Marvel, 1952 series) #113 (February 1965) |