Troughton's name was displayed on a computer readout of the Raymond family's genealogy, along with others such as Colin Baker, Tom Baker, Peter Davidson, William Hartnell, and Jon Pertwee. (TNG: "The Neutral Zone" , okudagram) This character was only mentioned in writing. Patrick Troughton is a reference to British actor Patrick Troughton who played the second incarnation of "The Doctor" in the British science fiction series Doctor Who.