Chris Walker-Thomson also credited as Christopher Thomson, (born 19 January 1991) voiced Zreeg / Councillor / UNIT Lieutenant in the Big Finish audio story Doctor Who and the Star Beast, and the Second Doctor in the Doctor Who: Lockdown! webcast Doctors Assemble!.
He also played Captain Derek Latimer in "UNIT Employment Training Series: Health and Safety", a one-time sketch in The Fan Show, and showcased his Doctor impersonations in a further episode of The Fan Show entitled Amazing Audio Adventures.
He is best known as a voice impersonator for the Second Doctor unprofessionally. A Facebook campaign for "Christopher Thomson as the Second Doctor for Big Finish" was launched, but shut down as of 2016.