Men of Mystery Comics #21

Credits

Script

Bill Black, P. C. Hamerlinck, Marc Swayze

Pencils

Marc Swayze, P. C. Hamerlinck, Alex Blum, Carl Pfeufer

Inks

Marc Swayze, Alex Blum, Carl Pfeufer

Editor

Bill Black

Characters

• Ibis
• Mr. Scarlet
• Spy Smasher
• Alan Armstrong
• Prince Amentep
• Brian Butler

Reprinted from

• America's Greatest Comics #1
• Spy Smasher #10
• America's Greatest Comics #7
• America's Greatest Comics #8
• Whiz Comics #47
• Wow Comics #32
• Wow Comics #56