Comic Title: Wonder Woman #120
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: February 1961
On Sale Date: December 22, 1960 Copyright Date December 22, 1960
Source: Library of Congress, Periodicals 1961

Frequency: Monthly, with the exception of March, June, Sept., and Dec.
Cover Price: $0.10
Page Count: 32
Circulation: 213000
Editor: Robert Kanigher

Title: "The Secret of Volcano Mountain"
Pages: 26

Feature(s):
Wonder Woman (of Earth-1)

Writer: Robert Kanigher
Penciller: Ross Andru
Inker: Michael Esposito

Reprinted In:
Showcase Presents Wonder Woman Vol. 2 TPB (2009)
Wonder Woman:The Silver Age Omnibus Vol. 1 HC (2022)

Feature Character(s)

• Wonder Woman (last appearance in Wonder Woman #119; next appearance in Justice League of America #3)

Supporting Character(s)

• Hippolyta (last appearance in Wonder Woman #118; next appearance in Wonder Woman #123)
• Amazons (last appearance in Wonder Woman #119; next appearance in Wonder Woman #121)
• Mer-Boy (last appearance in Wonder Woman #119; next appearance in Wonder Woman #121)
• Steve Trevor (last appearance in Wonder Woman #119; next appearance in Wonder Woman #121)

Villain(s)

• An alien monster from Mercury (no further appearances)

Other Character(s)

• The inhabitants of Mer-World (no further appearances)

Flashback Appearance(s)

• Wonder Girl (last appearance in Wonder Woman #119; next appearance in Wonder Woman #121)
• Hippolyta (last appearance in Wonder Woman #119; next appearance in Wonder Woman #121)

Synopsis:
A meteor-shaped spaceship brings an alien to Earth from Mercury. The alien generates intense cold and begins freezing the ocean. Wonder Girl intervenes to save Mer Boy and his people and then she defeats the monster, sending him back to Mercury.

Years later as Wonder Woman, Diana encounters the monster again. He has returned, this time with fire-powers. He captures Steve Trevor and forces Wonder Woman to back off or risk losing Steve. Wonder Woman manages to stop the creature, believing she has doomed Steve in the process. Fortunately, he is able to survive with the aid of his plane’s oxygen mask.