Filmography
1992–1993 Northern Exposure as Bellhop, Reverend Harding
1995 Medicine Ball as Mickey Collins
1997 Moloney as Billy O'Hara
1997–2003 Buffy the Vampire Slayer as Spike
1999–2004 Angel as Spike
1999 Millennium as Eric Swan
1999 Winding Roads as Billy Johnson
1999 House on Haunted Hill as Channel 3 Cameraman
2001 The Enforcers as Charles Haysbert
2001 Strange Frequency as Mitch Brand
2001 Andromeda as Charlemagne Bolivar
2002 Chance as Simon
2003 Spider-Man: The New Animated Series as Sergei (voice)
2004 The Mountain as Ted Tunney
2005 Cool Money as Bobby Comfort
2005–2010 Smallville as Professor Milton Fine / Brainiac
2007–2008 Without a Trace as Det. Grant Mars
2007 Saving Grace as Dudley Payne
2007 Shadow Puppets as Jack
2007 Superman: Doomsday as Lex Luthor (voice)
2007 P.S. I Love You as John McCarthy
2008 Torchwood as Captain John Hart
2008 The Capture of the Green River Killer as Ted Bundy
2008 Star Wars: The Clone Wars as Faro Argyus (voice)
2009 Moonshot: The Flight of Apollo 11 as Buzz Aldrin
2009 High Plains Invaders as Sam Denville
2009 Numb3rs as Damien Lake
2009 The Super Hero Squad Show as Mister Fantastic (voice)
2009 Lie to Me as Pollack
2009 Dragonball Evolution as Lord Piccolo
2010 Caprica as Barnabas Greeley
2010–2014 Hawaii Five–0 as Victor Hesse
2011 Supernatural as Donald Stark
2011 Three Inches as Troy Hamilton
2012 Metal Hurlant Chronicles as Brad Davis
2013 Wedding Band as Declan Horn
2013 Warehouse 13 as Professor Bennett Sutton
2013 Scooby-Doo! Mystery Incorporated as Dandy Highwayman, Librarian, Man (voices)
2013 Ultimate Spider-Man as Korvac, Chitauri #3 (voices)
2014 Metal Hurlant Chronicles as Doc Rowan
2014 Witches of East End as Tarkoff
2015 The Devil You Know as Reverend George Burroughs
2015 Dudes & Dragons as Lord Tensley
2017–present Runaways as Victor Stein
2018 Dragon Ball Super as Zamasu (voice)