Age team debuted in Thunderbolts #144 with a new main artist, Kev Walker. The title crossed over with Avengers Academy in issue #147, which was bookended by Avengers Academy #3 and #4. The series then went on to cross over with the Daredevil storyline "Shadowland" in issues #148-149, with artist Declan Shalvey stepping in for the two issues. The series then crossed over with the "Fear Itself" storyline in issues #158-163. The Thunderbolts comic book was renamed Dark Avengers beginning with issue #175, but the creative team remained unchanged. Dark Avengers ended with issue #190. As part of Marvel NOW!, a new Thunderbolts series was launched featuring a new team composed of Red Hulk, Deadpool, Elektra, Venom, and Punisher. This series ended in October 2014 with issue #32. Fictional team biography Baron Helmut Zemo's Thunderbolts Baron Helmut Zemo summoned several of his former allies from the prior incarnations of the Masters of Evil during a rescue attempt of Goliath (the former bodyguard to Baron Heinrich Zemo). The summoned members included Beetle, Fixer, Moonstone and Screaming Mimi. Zemo took the accidental gathering as an omen, and decided to reform the Masters of Evil and attack the Avengers. Before they could strike, the Avengers, and the Fantastic Four were apparently killed by the villain Onslaught. The death of the Avengers and Fantastic Four created an opportunity for Zemo and the Masters of Evil. Zemo realized that the world needed superpowered champions, and that his team could fill that need. By posing as superheroes, the Masters of Evil could gain the public trust and build a position of power that rivaled the status of the Avengers. Once they had gained the public's faith, Zemo believed they could gain access to all the secrets of the Avengers and S.H.I.E.L.D. once they were in ultimate power. Zemo then planned to sell the secrets they found to the criminal underworld. The villains adopted new heroic costumes and codenames. Baron Zemo became the patriotic American Citizen V, patterned after a WWII hero his father killed. Former Human Torch and Spider-Man foe Beetle became MACH-1, using a new high-tech suit designed by Fixer. Fixer became the gadget-wielding Techno. Long time Avengers enemy Goliath became the powerhouse Atlas. Screaming Mimi became Songbird, her damaged abilities aided by technology Zemo had adapted from ex-Master Klaw. Moonstone was secretly freed from the Vault and added to the team by Zemo, who