DC Retroactive is an exciting event honoring the defining eras of DC's core heroes, featuring an original story by the legendary writers and artists who helped mold the characters! The 1970s were a time of spacefaring thrills for the Emerald Knight! Now, writer Dennis O'Neil returns to the character for a brand-new epic starring Hal Jordan! Plus: Following the 26-page lead story is a classic tale originally published in the '70s, also written by Dennis O'Neil!