Comic Title: Rip Hunter... Time Master #29
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Nov/Dec 1965
On Sale Date: September 2, 1965 Copyright Date September 2, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Editor: George Kashdan

Title: "The Doom from Giant Valley"
Pages: 24

Feature(s):
Rip Hunter (of Earth-1)

Writer: George Kashdan
Artist: John William Ely

Feature Character(s)

• Rip Hunter (last appearance in Rip Hunter... Time Master #28; next appearance in Challengers of the Unknown #85)

Supporting Character(s)

• Jeff Smith (last appearance in Rip Hunter... Time Master #28; next appearance in Challengers of the Unknown #86)
• Bonnie Baxter (last appearance in Rip Hunter... Time Master #28; next appearance in Challengers of the Unknown #86)
• Corky Baxter (last appearance in Rip Hunter... Time Master #28; next appearance in Challengers of the Unknown #86)

Villain(s)

• Dr. Halsey (no further appearances)
• A 16th century army (no further appearances)
• A swarm of giant insects (no further appearances)

Other Character(s)

• Archarus (a legendary alchemist; no further appearances)
• Three friends of Archarus (no further appearances)
• Professor Binns (a scientist; no further appearances)

Synopsis:
Rip Hunter is contacted by Professor Binns, a scientist who has discovered an ancient growth formula. Unfortunately, his assistant Dr. Halsey has gone mad and is creating giant insects. Rip and his team travel into the past to find an antidote.

In the 16th century, Rip searches for the legendary alchemist Archarus. He finds a giant man tied to the ground and about to be executed. Rip saves the man, who in turn leads them to Archarus. Archarus and three of his friends have been turned into giants by the formula. Rip holds off an army bent on killing the giants, until the alchemist concocts an antidote.

Rip returns to the present with the antidote. Halsey has created an entire swarm of giant insects. Rip makes a smoke cloud using the antidote, changing all the insects back to normal. Halsey is then taken into custody.