In response to the restrictions imposed by the Comics Code Authority, DC began a new science-fiction series in 1956.

[1] The series featured artwork by Murphy Anderson, Gil Kane, and many others, with stories by John Broome, Gardner Fox, and additional writers.

It was an anthology comic for many years, publishing a variety of science fiction stories.

[6][7] DC revived the title for an eight-issue miniseries in 2006, focusing on the Crispus Allen incarnation of the Spectre, with a back-up series featuring Doctor Thirteen.

The back-up feature starred a team made up of Thirteen and his daughter Traci, I…Vampire, Genius Jones, Captain Fear, Infectious Lass, Anthro, the Primate Patrol, and the Haunted Tank.