Captain Boomerang

PRE-CRISIS FIRST APPEARANCE: The Flash #117 (December, 1960)

POST-FLASHPOINT FIRST APPEARANCE: Suicide Squad #3 (January, 2012)

During the Identity Crisis story, George Harkness is killed and his son, Owen Mercer (also known as Owen Harkness), takes over his father's role as Captain Boomerang for a period of time until his own death.

Following the Blackest Night storyline, George Harkness returns to life and returns as Captain Boomerang.