I see what you mean there. The character is called "The Celestial Toymaker", while the actor is Michael Gough (best known for playing Alfred in the Tim Burton/Joel Schumacher Batman movies). The Toymaker only appeared in one four-part story in 1966 (it doesn't help that three of the four parts are lost); he was going to come back during the Sixth Doctor's second season in 1986, but it ultimately never happened. However, the unused script was adapted into an audio book called "The Nightmare Fair".