(written from a Production point of view)
Marc Guggenheim (born 24 September 1970; age 50) is a television and comic book writer. He is known for his works on shows as a writer and producer such as The Practice, Law & Order, CSI: Miami, Brothers & Sisters, and FlashForward.
From Long Island, New York, Guggenheim was a lawyer in Boston for a few years before moving to the west coast as a screenwriter, landing a job on The Practice in 2001.
Ten years before breaking into the television industry, Guggenheim had joined the comics industry, serving as an intern at Marvel Comics. He rejoined the industry in 2005, writing a number of series for both DC and Marvel, including The Punisher, Wolverine, Aquaman, Blade, and The Flash. He also created Resurrection, a comic published by Oni Press. Around this same time, he co-created the television show Eli Stone, which ran for two seasons, writing five episodes of the twenty-six filmed.