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Main Cast - Who Plays the Companions?

A long train of assistants have helped the Doctor fight evil

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24. Sarah Sutton as Nyssa

BBC

Daughter of one of the leaders of Traken, with a strong bent toward science. Begs the Doctor for help after her father, Tremas, goes missing, and horrified to learn the Master has commandeered his body. Practical and sensible. Gains maturity in her travels with the Doctor and leaves to help free the inmates and guards of Terminus station from Lazar's disease. Fourth, Fifth Doctors. Stories as a companion include: "The Keeper of Traken", "Logopolis", "Castrovalva", "Four to Doomsday", "Kinda", "The Visitation", "Black Orchid", "Earthshock", "Time-Flight", "Arc of Infinity", "Snakedance", "Mawdryn Undead", "Terminus".

23. Matthew Waterhouse as Adric

BBC

A young boy with a remarkable capacity for mathematics, from a race of quick-healers. Stows away on the TARDIS. Brash and sometimes truculent, he is eager to learn all he can from the Doctor. Killed after being trapped on a freighter preprogrammed to crash into prehistoric Earth. Fourth, Fifth Doctors. Stories as a companion include: "Full Circle", "State of Decay", "Warriors' Gate", "The Keeper of Traken", "Logopolis", "Castrovalva", "Four to Doomsday", "Kinda", "The Visitation", "Black Orchid", "Earthshock".

22. Lalla Ward as Romana

BBC

Second incarnation. Very much the Doctor's peer as a traveling companion and activist against evil. Leaves to help the time-sensitive Tharils free their race from slavery and rebuild their civilization. Fourth Doctor. Stories as a companion include: "Destiny of the Daleks", "City of Death", "The Creature from the Pit", "Nightmare of Eden", "The Horns of Nimon", "The Leisure Hive", "Meglos", "Full Circle", "State of Decay", "Warriors' Gate".

21. Mary Tamm as Romana

BBC

A Time Lord recruited by the White Guardian to help the Doctor find the Key to Time. Imperious and sardonic, but capable of recognizing her book-smarts are not the same as the Doctor's knowledge. Regenerates for unknown reasons after the events of "The Armageddon Factor". Fourth Doctor. Stories as a companion include: "The Ribos Operation", "The Pirate Planet", "The Stones of Blood", "The Androids of Tara", "The Power of Kroll", "The Armageddon Factor".

20. John Leeson*, David Brierley* as K-9

BBC

The Doctor's "tin dog." A rolling computer equipped with a stun ray weapon. The original was a gift, and stayed with Leela on Gallifey; he built the second (which stayed with Romana) and the third (a gift for Sarah Jane). Fourth Doctor. Stories as a companion include: Mark I: "The Invisible Enemy", "Image of the Fendahl", "The Sun Makers", "Underworld", "The Invasion of Time"; Mark II: "The Ribos Operation", "The Pirate Planet", "The Stones of Blood", "The Androids of Tara", "The Power of Kroll", "The Armageddon Factor", "Destiny of the Daleks", "City of Death", "The Creature from the Pit", "Nightmare of Eden", "The Horns of Nimon", "The Leisure Hive", "Meglos", "Full Circle", "State of Decay", "Warriors' Gate"; Mark III: "School Reunion".

19. Louise Jameson as Leela

BBC

A warrior of the Sevateem. Intelligent but untaught, extremely adaptable, cunning, and fearless. Stays behind on Gallifrey (with K-9 Mark I) to be with Andred, a guard she'd been working with against the Sontarans. Fourth Doctor. Stories as a companion include: "The Face of Evil", "The Robots of Death", "The Talons of Weng-Chiang", "Horror of Fang Rock", "The Invisible Enemy", "Image of the Fendahl", "The Sun Makers", "Underworld", "The Invasion of Time".

18. Ian Marter as Harry Sullivan

BBC

A naval surgeon attached to UNIT. Accident-prone and unsubtle, occasionally making arch remarks but loyally supporting the Doctor despite his once shouting "Harry Sullivan is an imbecile!" Decides to stay behind on Earth when next they arrive in contemporary times. Fourth Doctor. Stories as a companion include: "Robot", "The Ark in Space", "The Sontaran Experiment", "Genesis of the Daleks", "Revenge of the Cybermen", "Terror of the Zygons", "The Android Invasion".

17. Elisabeth Sladen as Sarah Jane Smith

BBC

A liberated journalist with unbridled curiosity. She and the Doctor part company so that the Doctor can return to Gallifrey alone, but after further encounters she emulates him as a protector of Earth.  Third, Fourth Doctors. Stories as a companion include: "The Time Warrior", "Invasion of the Dinosaurs", "Death to the Daleks", "The Monster of Peladon", "Planet of the Spiders", "Robot", "The Ark in Space", "The Sontaran Experiment", "Genesis of the Daleks", "Revenge of the Cybermen", "Terror of the Zygons", "Planet of Evil", "Pyramids of Mars", "The Android Invasion", "The Brain of Morbius", "The Seeds of Doom", "The Masque of Mandragora", "The Hand of Fear", "The Five Doctors", "School Reunion", "The Stolen Earth", "Journey's End".

16. Katy Manning as Jo Grant

BBC

The Doctor's UNIT assistant, who got the job through family connections. She's persistent, curious, and actually rather sharp despite seeming to be, and referring to herself as, "exceedingly dim." Leaves to marry a crusading scientist not unlike the Doctor. Third Doctor. Stories as a companion include: "Terror of the Autons", "The Mind of Evil", "The Claws of Axos", "Colony in Space", "The Daemons", "Day of the Daleks", "The Curse of Peladon", "The Sea Devils", "The Mutants", "The Time Monster", "The Three Doctors", "Carnival of Monsters", "Frontier in Space", "Planet of the Daleks", "The Green Death".

15. Caroline John as Liz Shaw

BBC

Short-skirted Cambridge scientist seconded to UNIT. Returns to Cambridge after decided she's overqualified to hand the Doctor his test tubes. Third Doctor. Stories as a companion include: "Spearhead from Space", "Doctor Who and the Silurians", "The Ambassadors of Death", "Inferno".

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