Action Comics (1938-2011) #350
By Otto Binder, Henry Boltinoff, Leo Dorfman, Wayne Boring & Jim Mooney
- Release Date: 2018-06-07
- Genre: Comics & Graphic Novels
�THE SECRET OF THE STONE-AGE SUPERMAN!� Superman travels over a million years into the past to uncover the secret of a caveman skeleton in a Superman costume!