Blackout (Marcus Daniels) is the name of a fictional supervillain appearing in American comic books published by Marvel Comics. He is the first character to use the name within the Marvel Universe. Patrick Brennan portrayed the character in two episodes of the first season of Agents of S.H.I.E.L.D. Publication history Blackout first appeared in Nova #19 and was created by Marv Wolfman, Carmine Infantino, and Tom Palmer. Fictional character biography Marcus Daniels was born in Flushing, Queens, New York City. He was working as a laboratory assistant to Dr. Abner Croit, a physicist hoping to build a device capable of tapping into energies from other dimensions. Croit always looked down on Daniels' inferior knowledge, making him feel useless. Daniels always wondered what it would be like to harness the energy they were researching, to be powerful. After an accident bathed him in the extra-dimensional energy of the Darkforce, he had the chance to find out. Calling himself Blackout, his body was now flushed with power, becoming a surface of control of the Darkforce dimension. However, despite his powers threatening to go out of control, he escaped from Croit's attempts to cure him and fled. Blackout returned to the laboratories, however, as he needed the stabilizer device to control his energies. But he also returned to find revenge on Croit— Blackout's sanity began to suffer as well. He believed Croit was researching energies from "Black Stars" and that his body now generated such energy. He further believed that Croit was defrauding the government with his research and had bribed a judge to frame him for stealing his secrets. Instead of an accident causing his powers, Daniels thought Dr. Croit willfully subjected him to an experiment in exchange for dropping charges against him. Nova encountered Blackout on his way to exact revenge, and Blackout easily defeated the young hero. Before Nova could catch up with him, Blackout returned to the labs, killing Croit and his new assistant by letting them “merge with the color spectrum” (actually, by shunting them to the Darkforce dimension). Following another skirmish with Nova, Blackout himself vanished into this dimension when he fell back onto the stabilizer during the battle, destroying it. The stabilizer somehow ended up at Project Pegasus, the government energy research laboratory. An attack by the Lava Men and the presence of Captain Marvel (Monica Rambeau) managed to activate the device, which transported Blackout back