Cast & creator
James Callis
Best known for CSI: Crime Scene Investigation, Slow Horses, Midsomer Murders
James Callis (born 4 June 1971) is a British actor. He is best known for playing Dr. Gaius Baltar in the re-imagined Battlestar Galactica miniseries and television series, and Bridget Jones' best friend in Bridget Jones's Diary and Bridget Jones: The Edge of Reason. He joined the cast of the TV Series Eureka, on Syfy, in 2010.
26
film credits
35
television credits
56
1987–2025 · acting roles
6.5
average across scored titles
Signature credits
Known for
Across film & television
Filmography (61)
Showing 61 of 61 credits
CSI: Crime Scene Investigation
John Merchiston
2000
Slow Horses
Claude Whelan
2022
Midsomer Murders
Toby DeQuetteville
1997
Rick and Morty
Pat Gueterman / Courier Flaps (voice)
2013
Arrow
The Dodger
2012
Jason and the Argonauts
Aspyrtes
2000
Numb3rs
Mason Duryea
2005
MacGyver
The Merchant / Clive
2016MacGyver
Merchant
2016
Battlestar Galactica
Gaius Baltar
2004
Merlin
Julius Borden
2008
Eureka
Dr. Trevor Grant
2006
12 Monkeys
Athan Cole
2015
Star Trek: Picard
Maurice Picard
2020Star Trek: Picard
The Psychiatrist / Maurice Picard
2020
Relic Hunter
Raoul
1999
Portlandia
James Callis
2011
Key & Peele
Shakespeare
2012
The Musketeers
Émile Bonnaire
2014
FlashForward
Gabriel McDow
2009
The Ruth Rendell Mysteries
Guy Curran
1987
Castlevania
Adrian Tepes / Alucard (voice)
2017
Castlevania: Nocturne
Alucard (voice)
2023
Battlestar Galactica
Gaius Baltar
2003
Blood & Treasure
Simon Hardwick
2019
Bridget Jones: Mad About the Boy
Tom
2025
Murder Most Horrid
Mark
1991
As If
Sebastian
2001
Bridget Jones's Diary
Tom
2001
Bridget Jones's Baby
Tom
2016
Helen of Troy
King Menelaus of Sparta
2003
Fallen
Edward Van Lockwood
2024
Bridget Jones: The Edge of Reason
Tom
2004
Arabian Nights
Prince Ahmed
2000
Caper
Doc English
2014
A Dance to the Music of Time
Gwinnett
1997
Gallipoli
Ellis Ashmead-Bartlett
2015
One Night with the King
Haman, the Agagite
2006
Battlestar Galactica: Razor
Dr. Gaius Baltar
2007
Austenland
Colonel Andrews
2013
Sex, Chips & Rock n' Roll
The Wolf
1999
Merlin and the Book of Beasts
Merlin
2009
Narcopolis
Todd Ambro
2015
Victoria & Albert
2001
Once Upon a Date
Ed Holland
2017
Victoria & Albert
Ernest
2001
All Cock and No Bull!
Director
2019All Cock and No Bull!
Writer
2019All Cock and No Bull!
Executive Producer
2019
The Hollow
Vaughn Killinger
2016
House by the Lake
Scott
2017House by the Lake
Producer
2017Sex, Chips & Rock n' Roll
1999
Break Even
Zalman
2020
The Bay House
Ryan Brooks
2022
Dead Cool
Josh
2005
17th Precinct
John Bosson
2011
Podfather
Self - Narrator (voice)
2009
Blood Moon
2016
Reuniting the Rubins
Danny Rubin
2011
Beginner's Luck
Writer
2002