| Issue | #208 |
| Published | February 1973 |
| Cover Price | 0.20 USD |
| Pages | 36 |
| Editing | Roy Thomas |
| Characters | Thor; Mercurio |
| Synopsis | Thor vs Mercurio |
| Genre | Superhero |
| Pencils | Gil Kane |
| Inks | Frank Giacoia; Marie Severin |
| Characters | Thor; Mercurio, the Fourth-Dimensional Man [Karl Sarron] (I); Hildegarde; Edwin Jarvis; Karl Sarron (D); The Ruler of Gramos (I); Warriors Three [Hogun; Fandral; Volstagg]; Vision; Cameos: Ego-Prime; Loki; Absorbing Man; Odin; Sif; Karnilla; Balder |
| Genre | Superhero |
| Script | Gerry Conway |
| Pencils | John Buscema |
| Inks | Vince Colletta |
| Colors | Stan Goldberg |
| Letters | Carl Jetter |
| Notes | First appearances of Mercurio, the Fourth-Dimensional Man and the Ruler of Gramos, death of Karl Sarron. |