Comic Title: Detective Comics #261
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: November 1958
On Sale Date: September 25, 1958 Copyright Date September 25, 1958
Source: Library of Congress, Periodicals 1958

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

Title: "The Amazing Dr. Double X"
Pages: 12

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

Writer: Dave Wood
Penciller: Sheldon Moldoff
Inker: Charles Paris

Reprinted In:
Batman Family #7 (1976)

Feature Character(s)

• Batman (last appearance in Detective Comics #260; next appearance in Batman #120)

Supporting Character(s)

• Robin (last appearance in Detective Comics #260; next appearance in Batman #120)
• Commissioner Gordon (last appearance in World's Finest Comics #97; next appearance in Batman #120)

Villain(s)

• Dr. X and Dr. Double X (his energy twin; next appearance in Detective Comics #316)

Synopsis:
Batman and Robin chase down a new costumed criminal, Dr. X. When they find him, a phantom double with amazing powers appears and begins battling the heroes. The double disappears at the last moment, and Batman takes the doctor to jail.

In prison, Dr. Double X appears again and breaks Dr. X out. They lure Batman and Robin into a trap and try to perform an experiment on Batman. A phantom double of Batman appears and tries to act evil. However, the double is the real Batman, the captured one is merely a robot. The trick helps to allow Batman to stop Dr. X and take him back to prison.