Secret Origins was first published as a one-shot in 1961 and contained only reprinted material.
- "The Origin Of The Superman/Batman Team"
- "The Secret Of The Eternal City"
- "Planet Of The Doomed Men"
- "The Secret Of The Sorcerer's Box"
- "The Secret Origin Of Wonder Woman"
- "The Strange Experiment Of Dr. Erdel"
- "Mystery Of The Human Thunderbolt"
Ongoing series -> Secret Origins (Vol. 1)
The title became an ongoing reprint series in March 1973 which ran for only seven issues and ended in November 1974.
Secret Origins (Vol. 2)
Secret Origins (Vol. 2) ran for 50 issues (plus three annuals and a special from April 1986 to August 1990. Typically, an issue would clarify the post-Crisis origins of a number of characters, usually two as most of the issues were double-sized, i.e. 48 pages.
Two more specials followed in 1998-1999.
The New 52 -> Secret Origins (Vol. 3)
Secret Origins (Vol. 3) ran for 11 issues, from June 2014 to May 2015.