Alexander (Japanese: アレクサンダー戦記 , Hepburn: Arekusandā Senki , lit.
 "The Alexander War Chronicles") , released in North America as Reign: The Conqueror, is a Korean-Japanese anime first released in 1999.
 A re-imagination of the life of Alexander the Great based on the novel of the same name by Hiroshi Aramata, the series was produced by international crew that drew from the resources of the worldwide animation community.
 Character and setting design for the show was conceived by Peter Chung, the Korean animator who created the MTV Animated series Æon Flux.
 Most of the production work was handled by Korean animators.
The Chronicles of Riddick: Dark Fury is a 2004 made-for-DVD animated science fiction film.
 It was directed by the Korean-American animator Peter Chung, and features Vin Diesel reprising his role of Richard B. Riddick.
 It acts as a bridgepoint between "Pitch Black" and "The Chronicles of Riddick".
Firebreather is an American CGI animated television film, based on the Image Comics comic book series of the same name, which premiered on November 24, 2010 on Cartoon Network.
 It was directed by Peter Chung from a screenplay by James Krieg based on a story of Phil Hester and Andy Kuhn, and stars the voices of Jesse Head, Dana Delany, Kevin Michael Richardson, Reed Diamond, Dante Basco, Tia Texada, and Amy Davidson.
John Rafter Lee is a British actor, voice actor, professional narrator, playwright and producer who is best known for his portrayal of the mysterious Trevor Goodchild in Peter Chung's "Æon Flux".
 Other notable voice credits include Meier Link in both "" and "Vampire Hunter D", Pavlo Zaitsev in episode 16 of "", Jason Wynn in HBO's "Spawn" animated series, and Aristotle in "Reign: The Conqueror"
Drew Neumann is an American musician and composer of film and television scores.
 He created the soundtrack of the science fiction animated series Æon Flux, and has composed music for many other shows including "The Wild Thornberrys", "Bunnicula", "The Grim Adventures of Billy & Mandy" and "Aaahh!!!
 Real Monsters".
 He studied film, animation, and composition at the California Institute of the Arts, where he graduated with a BFA (1982).
 He has been longtime friends with animator Peter Chung.
 He also assisted in the development of, and contributed sound patches and timbres to Moog Music's award-winning Animoog iPad app.
Æon Flux is a 2005 American science fiction spy action film based on the animated science fiction television series of the same name created by Peter Chung.
 It was directed by Karyn Kusama, written by Phil Hay and Matt Manfredi, and produced by Gale Anne Hurd, David Gale, Gary Lucchesi and Greg Goodman.
 The film was produced by MTV Films, Lakeshore Entertainment, Babelsberg Film Studio and Valhalla Motion Pictures.
 It stars Charlize Theron as the title character, Marton Csokas, Jonny Lee Miller, Sophie Okonedo, Pete Postlethwaite, and Frances McDormand.
Peter Chung (born March 25, 1979), better known by his stage name Cool Calm Pete, is an Korean American rapper and producer from Seoul, Korea, who is currently based in Queens, New York.
 Cool Calm Pete has been profiled in major publications such as URB and XXL.
 He is a founding member of the hip hop trio Babbletron.
Stephen Roberts (23 November 1895 – 17 July 1936) was an American film director.
 He directed 105 films between 1923 and 1936.
 He was born in Summersville, West Virginia, and died in Los Angeles, California from a heart attack.
Robert Valley is a Canadian animator and visual graphic artist.
 He has a distinct visual style that is influenced by Peter Chung and Gorillaz creator Jamie Hewlett.
 Valley was born In Vancouver in 1969.
 After completing a four-year animation course in Vancouver, he moved to San Francisco in 1992.
Peter Kunshik Chung (born April 19, 1961 in Seoul, South Korea) is a Korean American animator.
 He is best known for his unique style of animation, as the creator and director of "Æon Flux", which ran as shorts on MTV's Liquid Television before launching as its own half-hour television series.

Question: What profession does Stephen Roberts and Peter Chung have in common?
Answer: director