"This is the way they explained it to me," says Brennan of Blackout, whose character and powers will be somewhat different from the comic book version. "This guy, Marcus Daniels, a.k.a. Blackout, was shrouded in darkness, his soul, everything about him was shrouded in darkness until he comes across this Cello player. And the music was the only light that came into his soul, and it gave him hope and it gave him some sense of what light was. I thought to myself, oh my god, you don’t even need to explain anything else. Because music, to me, is what gets me through most of the time. My kids, my wife, and music. That aspect of it totally intrigued me. I thought that was quite beautiful and very interesting, that aspect of the character."
The cellist mentioned is almost certainly Amy Acker's Audrey, who Marvel showed off yesterday and who is also slated to appear in the April 22 episode.
“Marvel’s Agents of S.H.I.E.L.D.” stars Clark Gregg as Agent Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Agent Grant Ward, Chloe Bennet as Skye, Iain De Caestecker as Agent Leo Fitz and Elizabeth Henstridge as Agent Jemma Simmons.