On June 1, 2007, The Hollywood Reporter announced that Greenwalt would serve as executive producer and showrunner on Moonlight, a new series that will debut on CBS in the fall of 2007. He later had to leave the show before it was first aired for health reasons. Executive producer Joel Silver said that his name would remain: "He worked really hard on the arc of the series. He really helped us focus and get started".
- Writer - Moonlight, Kidnapped, Surface, Miracles, Jake 2.0, Angel, Buffy the Vampire Slayer, The X-Files, Profit, The Wonder Years, The Commish, Doogie Howser, M.D.
- Director - The Wonder Years, Buffy the Vampire Slayer, Angel, Jake 2.0
- Producer - Kidnapped, Moonlight, Surface, Jake 2.0, Miracles, Angel, Buffy the Vampire Slayer, The X-Files, Profit, The Commish, Eureka