Richard Thomas Griffiths, OBE was an English actor of film, television, and stage. He received the Laurence Olivier Award for Best Actor, the Drama Desk Award for Outstanding Actor in a Play, the Outer Critics Circle Award for Best Featured Actor and a Tony Award for Best Performance by a Leading Actor in a Play, all for his role in 'The History Boys'. Wikipedia*
On the C-SPAN Networks:
Richard Griffiths has one video in the C-SPAN Video Library; the first appearance was a 2005 Forum.