A veteran TV writer, Marc Guggenheim has scribed episodes of The Practice, Law & Order and Brothers & Sisters; created the series Eli Stone; and served as a writer/producer for FlashForward and executive producer on the highly successful Arrow. In the world of comics, he came on strong with memorable work on Blade, Wolverine, Amazing Spider-Man and Young X-Men. Subsequent Marvel credits include X-Men, the Secret Wars limited series Squadron Sinister and X-Tinction Agenda, and Agents of S.H.I.E.L.D. for All-New, All-Different Marvel.