James Callis

James Callis is a British actor who is best known for playing Dr. Gaius Baltar in the re-imagined Battlestar Galactica miniseries and television series. Baltar is a brilliant but unstable scientist — whose unwitting complicity aided the Cylon slaughter of humanity —defeated Laura Roslin to become President of the Twelve Colonies and surrendered the fledgling human settlement of New Caprica to its Cylon occupiers. Stylish, handsome, and idiosyncratic, he often displays the false humility of the truly arrogant and also is secretly plagued by unexplained visions of the beautiful Cylon Number Six.

London-born James Callis studied English and related literature at the University of York. After graduating in 1993, he gained a place at the renowned London Academy of Music and Dramatic Art, from which he graduated in 1996. Since then, he has appeared in various West End stage productions, as well in film and on TV and radio.

He made his West End debut in Old Wicked Songs alongside Bob Hoskins in 1996, earning the London Critics' Circle's Jack Tinker Award for Most Promising Newcomer. He appeared at the Almeida Theatre in George Bernard Shaw's The Doctor's Dilemma in 1998, and at the Soho Theatre in London in 2002, in Peter Ackerman's Things You Shouldn't Say Past Midnight. He broke into television in 1996 with a guest role on the British series Murder Most Horrid and with a recurring role in the ensemble of the long-running U.K. drama Soldier Soldier. Callis went on to appear in a number of telefilms and miniseries, including The Scarlet Pimpernel (1999) and Jason and the Argonauts (2000), the USA Network miniseries Helen of Troy (2003) and played Bridget's gay best friend Tom in the hit movie Bridget Jones's Diary (2001). He co-wrote and co-directed the film Beginner's Luck (2001), in which he starred opposite Julie Delpy.

Callis, whose recent work includes recurring on Eureka as Dr. Trevor Grant lives in London with his wife, Neha and three beautiful children.