Comic Title: Detective Comics #291
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: May 1961
On Sale Date: March 28, 1961 Copyright Date March 28, 1961
Source: Library of Congress, Periodicals 1961

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Creature from the Bat-Cave"
Pages: 13

Feature(s):
Batman (of Earth-1)

Penciller: Sheldon Moldoff
Inker: Charles Paris

Feature Character(s)

• Batman (last appearance in World's Finest Comics #117; next appearance in Batman #140)

Supporting Character(s)

• Robin (last appearance in World's Finest Comics #117; next appearance in Batman #140)
• Commissioner Gordon (last appearance in Batman #139; next appearance in Batman #140)

Villain(s)

• A Rukk (an alien pet; no further appearances)
• Big Ed Bailey and his gang (no further appearances)
• Bertie (a handyman; no further appearances)

Other Character(s)

• Professor Heims (a noted scientist; no further appearances)

Synopsis:
A rock fall in the Bat-Cave uncovers an alien capsule buried within. A large one-eyed creature emerges from the capsule and begins menacing Gotham City. Batman learns from a strange headpiece within the capsule that the creature was sent to Earth long ago to retrieve four special pyramids. The alien masters of the creature have also sent a weapon that can destroy the creature, called a Rukk, if necessary.

The Dynamic Duo tracks the Rukk, but a gang learns of the situation. Gang boss, Ed Bailey, decides to destroy the weapon so the Rukk will return to the Bat-Cave revealing its location. With the weapon destroyed, Batman and Robin can not stop the creature. Instead, Batman moves the capsule into a clearing so the Rukk sees it. Once it has the pyramids, the Rukk enters the capsule and returns to its home planet, which Batman believes was destroyed long ago.