Comic Title: Challengers of the Unknown #61
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Apr/May 1968
On Sale Date: February 1, 1968 Newsstand Date February 1, 1968
Source: Direct Currents, Justice League of America #61, Page 18

Copyright Date February 1, 1968
Source: Library of Congress, Periodicals 1968

Newsstand Date February 1, 1968
Source: Comic Reader, #64

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Circulation: 182540
Editor: Murray Boltinoff

Title: "The Robot Hounds of Chang"
Pages: 16

Feature(s):
Challengers of the Unknown (of Earth-1)

Writer: Arnold Drake
Artist: Bob Brown

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #60; next appearance in Challengers of the Unknown #61)
• Ace Morgan (last appearance in Challengers of the Unknown #60; next appearance in Challengers of the Unknown #61)
• Rocky Davis (last appearance in Challengers of the Unknown #60; next appearance in Challengers of the Unknown #61)
• Prof. Haley (last appearance in Challengers of the Unknown #60; next appearance in Challengers of the Unknown #61)
• Red Ryan (last appearance in Challengers of the Unknown #60; next appearance in Challengers of the Unknown #61)

Villain(s)

• Professor Chang and his robots (no further appearances)

Synopsis:
After a series of heists involving robots, the Challengers trace the thefts to Professor Chang, an inventor on a a remote island. The team is captured shortly after landing and forced to endure a chase across the island pursued by Chang's robotic creatures. Ace eventually disables the robot brain powering the robots. Chang himself is dragged into the ocean when one of the powerless robots falls from the sky.