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.
Grace Holloway
Dr. Grace Holloway is a fictional character played by Daphne Ashbrook in the 1996 television movie "Doctor Who", a continuation of the long-running British science fiction television series "Doctor Who". A cardiologist from San Francisco in 1999, she assists the Eighth Doctor in defeating the renegade Time Lord, the Master.