| Issue | #25 |
| Published | March-April 1960 |
| Cover Price | 0.10 |
| Pages | 36 |
| Editing | Jack Schiff (Editor); Murray Boltinoff (Associate Editor); George Kashdan (Associate Editor) |
| Genre | science fiction |
| Pencils | Joe Kubert |
| Inks | Jack Adler |
| Notes | Third Rip Hunter appearance. Wash cover. |
| Characters | Rip Hunter; Bonnie Baxter; Corky Baxter; Professor Blakeslee; Doctor Senn; King Gamina; Cholorus the Sorcerer |
| Synopsis | As a favor to his friend Professor Blakeslee, Rip agrees to take Doctor Senn into the past. The destination is the island kingdom of Rittannia in the year 960. Upon arrival, Senn takes off on his own. While waiting for his return, Rip and his crew are discovered by King Gamina and his guards. Captured, they are taken to the city and thrown into a dungeon. Out of nowhere, Cholorus the Sorcerer appears to ask why the strangers have not been thrown into the Valley of Monsters. The King reminds Cholorus that he rules by the Code of Ritannia, and what he says goes. When nightfall comes, Rip uses nearby horses to break out of the cell, but is discovered by Cholorus and his men. Now Cholorus will get his wish and Rip, Bonnie, and Corky will be thrown into the Valley of Monsters. |
| Genre | science fiction |
| Script | Jack Miller |
| Pencils | Joe Kubert |
| Inks | Joe Kubert |
| Notes | Chapter 1 |
| Genre | Teen |
| Script | Jack Schiff |
| Pencils | Ruben Moreira |
| Inks | Ruben Moreira |
| Letters | Ira Schnapp |
| Genre | Gags |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Characters | Rip Hunter; Bonnie Baxter; Corky Baxter; King Gamina |
| Synopsis | The Time Masters travel across the Valley, doing their best to avoid a giant water lizard, a horned monster, and a monster porcupine. When they come to the end of the valley, they make their way back to the time sphere, where they're surprised to find King Gamina bound as a prisoner in the sphere. |
| Genre | science fiction |
| Script | Jack Miller |
| Pencils | Joe Kubert |
| Inks | Joe Kubert |
| Notes | Chapter 2 |
| Genre | Gags |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Typeset |
| Letters | Typeset |
| Characters | Rip Hunter; Bonnie Baxter; Corky Baxter; King Gamina; Cholorus the Sorcerer; Doctor Senn |
| Synopsis | Turns out that it's the real King Gamina in the sphere, and an imposter back in the city. The imposter is bargaining with Cholorus, offering the sorcerer his kingdom for the secrets of his sorcery. The deal would have been done, but Rip and company arrive. The imposter King is revealed as really Dr. Senn, who had pursuaded Blakeslee to help him at gunpoint. Cholorus, tired of the deception, leads his followers against the city, and it's now magic and sorcery against the city's defenses. In the end, Rip and the Time Sphere fly over Cholorus, and Rip ropes the sorcerer, removing the source of his power, a ring with a power stone. Rip destroys the ring, and begins the trip back home. |
| Genre | science fiction |
| Script | Jack Miller |
| Pencils | Joe Kubert |
| Inks | Joe Kubert |
| Notes | Chapter 3 |