Captured by the Flash following a month-long crime spree spent robbing armored cars, Boomerang was convicted and incarcerated for his crimes. In exchange for amnesty, Boomerang elected to join Task Force X, a government covert operations team composed of criminals under the watch of Colonel Rick Flagg.
Having managed to gain early release from "the squad" (instead of the five years normally required by its recruits), Boomerang returned to Central City shortly before the Flash Museum's dedication. He soon chose to join forces with three other Flash foes to take revenge on the Scarlet Speedster. After Mirror Master's attempt to kill Flash failed, Boomerang attacked the hero with multiple exploding boomerangs. Then, he dispatched a giant boomerang rocket to clamp onto Flash, with the intention of crashing into a mountain, but Flash managed to disable the device and escape. Later, Captain Boomerang and the other villains tried to ambush Flash at the museum opening. With help from Batman and Orion, Flash defeated Boomerang and his companions, and the Rogues were taken into custody.
Abilities and weaponry
Captain Boomerang, as his name implied, was an expert with the aboriginal weapon and employed a varied arsenal of specialized boomerangs in his crimes.
Captain Boomerang is "Digger" Harkness, an Australian hired as a boomerang promoter by a toy company owned by his biological father. After being ridiculed by the audience, an angry Harkness used his boomerang skills in crimes. Captain Boomerang was killed during the Identity Crisis storyline (at the same time killing his killer, Jack Drake, Robin's father) and was succeeded by his son, Owen Mercer. In the Blackest Night event, Digger Harkness was revived as a Black Lantern, and he killed his own son. After Nekron's defeat, he was restored to life and rejuvenated, but he has since been incarcerated by the Flash.
- "Eclipsed, Part I" (Lightspeed Energy Bar commercial)
|PR / Manager||Maxwell Lord|
|Psychology||Hugo Strange • Moon|
|Military Tactics||Wade Eiling|
|Captain Atom • Doomsday • Galatea|
|Ultimen||Downpour • Juice • Shifter • Long Shadow • Wind Dragon|
|Task Force X||Captain Boomerang • Clock King • Deadshot • Rick Flagg • Plastique|