Challengers of the Unknown

(1969-1970)

Writers
Dennis O'Neil • Murray Boltinoff
Artist
Jack Sparling
Genres
Action Exploration Sci-Fi
Themes
Cosmic SuperTeams

The Secret of Skull Mountain

  • Challengers of the Unknown Volume 1 #68
  • Challengers of the Unknown Volume 1 #69
  • Challengers of the Unknown Volume 1 #70

A Plague of Darkness

  • Challengers of the Unknown Volume 1 #71
  • Challengers of the Unknown Volume 1 #72
  • Challengers of the Unknown Volume 1 #73

To Call a Deadman

  • Challengers of the Unknown Volume 1 #74