Second Doctor
The Second Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series "Doctor Who". He was portrayed by character actor Patrick Troughton.
William Thomas (actor)
William Thomas (also known as William Huw-Thomas) is a Welsh actor, who has appeared in many TV episodes and films. He made his first appearance on TV in 1974, and his work, as an actor, is still ongoing. He is known for his roles in two "Doctor Who" episodes, along with roles in other major TV programmes, including "Only Fools and Horses" and "Midsomer Murders" in 2007.