The original incarnation of the Doctor
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The second incarnation of the Doctor
The third incarnation of the Doctor
The Doctor's grand-daughter
Susan's History teacher
Susan's Science teacher
An orphan from the 25th century
A space pilot from Earth in the future
An inhabitant of ancient Troy
A security officer from the 40th century
An Earth teenager from the year 1966
A secretary from 1966
A Royal Navy sailor from 1966
Co-founder and commander of the British contingent of UNIT
Senior NCO in the British contingent of UNIT
A civilian scientific adviser for UNIT
A race of mutants in metal casings bent on the conquest of the universe
A race of cyborgs without emotions
Reptilian humanoids from the planet Mars
Robot soldiers working for a mysterious entity
The Doctor's race, from the planet Gallifrey
