John Sessions
From Tardis Wiki, the free Doctor Who reference
John Sessions (born John Gibb Marshall) is a RADA trained actor, comedian and sometimes panellist on British quiz comedies. He is particularly well known, at least in Britain, as one of the original regular panellists on Who's Line Is It Anyway? and, more recently, as a recurring guest on QI.
He appeared on televised Doctor Who with the Twelfth Doctor. He provided multiple voices for Big Finish Productions, as well as voicing a character in a BBCI animated webcast. He was offered the role of the Eighth Doctor.