Zack Whedon an episode of Milch's next series "John from Cincinnati". Alongside his brothers Joss and Jed, he co-created and co-wrote the parody musical "Dr. Horrible's Sing-Along Blog". He has worked on the FOX science-fiction series "Fringe" and the AMC drama "Rubicon". In Jan 2014, Dark Horse Comics released "", a six-issue comic book series written by Whedon with art by Georges Jeanty that continues the story of brother Joss's cult television show "Firefly", and its subsequent film adaptation "Serenity". The comic is also executive produced by Joss Whedon and continues the story roughly 39 weeks after the events of the film.
Joss Whedon would not be brought back for a sixth season. Whedon said of the cancellation, "I believe the reason "Angel" had trouble on The WB was that it was the only show on the network that wasn't trying to be "Buffy". It was a show about grown-ups". An official continuation of the story came rather in the form of a comic book series. Following the successful eighth season of "Buffy the Vampire Slayer", IDW Publishing approached Whedon about similarly producing a canonical sixth season for "Angel". "" released 17 issues written by Whedon and Brian Lynch. Whedon followed "Angel" with the