Comic Title: Challengers of the Unknown #30
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Feb/Mar 1963
On Sale Date: December 13, 1962 Copyright Date December 13, 1962
Source: Library of Congress, Periodicals 1963

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Contains: Ownership Statement
Circulation: 195000
Editor: Murray Boltinoff

Title: "The Fifth Challenger"
Pages: 13

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

Artist: Bob Brown

Reprinted In:
Showcase Presents:Challengers of the Unknown Vol. 2 TPB (2008)

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #30; next appearance in Challengers of the Unknown #31)
• Ace Morgan (last appearance in Challengers of the Unknown #30; next appearance in Challengers of the Unknown #31)
• Rocky Davis (last appearance in Challengers of the Unknown #30; next appearance in Challengers of the Unknown #31)
• Red Ryan (last appearance in Challengers of the Unknown #30; next appearance in Challengers of the Unknown #31)
• Prof. Haley (last appearance in Challengers of the Unknown #30; next appearance in Challengers of the Unknown #31)

Supporting Character(s)

• June Robbins (last appearance in Challengers of the Unknown #28; next appearance in Challengers of the Unknown #33)
• F. Gaylord Clayburn III (a sportsman; first appearance; next appearance in Super-Team Family #10)

Villain(s)

• A criminal scientist and his hirelings (no further appearances)

Synopsis:
Sportsman Gaylord Clayburn petitions to join the Challengers. He is granted a try-out, proving himself to be fearless and skilled. However, he makes a pair of errors while fighting a criminal gang, that allows the other team members to be captured. He tries to rescue them, but fails. June is able to assist in rescuing Clayburn, then together they free the others and capture the crooks. Clayburn decides he is not worthy of membership on the team.