Dr Mark Glaser is played by Toby Jones.
Starting out in the theatre, Toby Jones first appeared on the big screen in the early 90s with a part in Sally Potter's Orlando. Since then, he has appeared in more than 20 features.
Toby has twice worked with Oliver Stone - in W. and Frost/Nixon - and he starred as Truman Capote in Infamous. On a lighter note, it is his voice behind Dobby the House Elf from the Harry Potter films, and he plays Smee, sidekick to Captain Hook, in Finding Neverland.
Television work includes the HBO/Channel 4 collaboration on Elizabeth I, and a recurring role as a pathologist in Midsomer Murders.
As a stage actor, Toby has won an Olivier, and been Tony-nominated on Broadway, for his role in musical farce The Play What I Wrote. He continues to work in the theatre, appearing at the National Theatre in Tom Stoppard's Every Good Boy Deserves Favour in 2009.
The image of Toby Jones, above, is used courtesy of Andrew Ogilvy.