took his place. Carpenter and Denisof were followed later by Mercedes McNab (Harmony Kendall) and James Marsters (Spike). Several actors and actresses who played Buffy characters made guest appearances on Angel, including Seth Green (Daniel "Oz" Osbourne), Sarah Michelle Gellar (Buffy Summers), Eliza Dushku (Faith), Tom Lenk (Andrew Wells), Alyson Hannigan (Willow Rosenberg), Julie Benz (Darla), Mark Metcalf (The Master), Julia Lee (Anne Steele) and Juliet Landau (Drusilla). Angel also continued to appear occasionally on Buffy. Other actors that appeared in both the Buffy the Vampire Slayer and Angel series but as different characters include: Bob Fimiani as Mr. Ward, a head of the Department of Defense in Buffy and Glith-roo, a Codger Demon in Angel; Carlos Jacott as a demon named Ken in Buffy and a different demon named Richard Straley in Angel; Jonathan M. Woodward as a vampire and former classmate in Buffy named Holden Webster and Knox, a Wolfram and Hart scientist in Angel; and Andy Umberger who played a demon name D'Hoffryn in Buffy and predator named Ronald Meltzer in Angel. The storyline has been continued in the comic book series Angel: After the Fall published by IDW Publishing and later Angel and Faith published by Dark Horse Comics. Expanded universe Outside of the TV series, the Buffyverse has been officially expanded and elaborated on by authors and artists in the so-called "Buffyverse Expanded Universe". The creators of these works may or may not keep to established continuity. Similarly, writers for the TV series were under no obligation to use information which had been established by the Expanded Universe, and sometimes contradicted such continuity. Dark Horse has published the Buffy comics since 1998. In 2003, Whedon wrote an eight-issue miniseries for Dark Horse Comics titled Fray, about a Slayer in the future. Following the publication of Tales of the Vampires in 2004, Dark Horse Comics halted publication on Buffyverse-related comics and graphic novels. The company produced Whedon's Buffy the Vampire Slayer Season Eight with forty issues from March 2007 to January 2011, picking up where the television show left off—taking the place of an eighth canonical season. The first story arc is also written by Whedon and is called "The Long Way Home", which has been widely well-received, with circulation rivaling industry leaders DC and Marvel's top-selling titles. After "The Long Way Home" came other story arcs like Faith's return in "No Future for You" and