The Fourth Doctor (Tom Baker)
Appearances
Season 11:
Planet of the Spiders
Season 12:
Robot
The Ark in Space
The Sontaran Experiment
Revenge of the Cybermen
Season 13:
Terror of the Zygons
Planet of Evil
Pyramids of Mars
The Android Invasion
The Brain of Morbius
The Seeds of Doom
Season 14:
The Masque of Mandragora
The Hand of Fear
The Deadly Assassin
The Face of Evil
The Robots of Death
The Talons of Weng-Chiang
Season 15:
Horror of Fang Rock
The Invisible Enemy
Image of the Fendahl
The Sun Makers
Underworld
The Invasion of Time
Season 16:
The Ribos Operation
The Pirate Planet
The Stones of Blood
The Androids of Tara
The Power of Kroll
The Armageddon Factor
Season 17:
Destiny of the Daleks
City of Death
The Creature from the Pit
Nightmare of Eden
The Horns of Nimon
Shada
Season 18:
The Leisure Hive
Meglos
Full Circle
State of Decay
Warriors’ Gate
The Keeper of Traken
Logopolis
Season 19:
Castrovalva
Season 20:
The Five Doctors
Filled with wanderlust and a renewed curiosity towards exploring time and space, the Fourth Doctor, played by Tom Baker, left all ties of his previous incarnation’s exile behind on Earth, setting off to travel the Cosmos. He initially traveled with Sarah Jane Smith and Harry Sullivan, but Harry chose to remain on Earth when the opportunity arose. The Doctor and Sarah continued on their adventures until the Doctor was summoned to Gallifrey, necessitating that he leave Sarah Jane behind as humans were not allowed on Gallifrey.
After tangling with the Master on Gallifrey, he met and traveled with Leela of the Sevateem. During his travels with Leela, the Doctor gained a new companion in the robot dog, K9. Returning once more to Gallifrey to stop an invasion of Vardans, Leela and the original K9 stayed behind there.
On the White Guardian’s orders, the Doctor began looking for the Key to Time with fellow Time Lady Romana and K9 Mark II. Once that search was concluded, the Doctor and Romana went on the run from the Black Guardian. Not long after, Romana regenerated into a new body and continued to travel with the Doctor and K9. When they attempted to answer a Gallifreyan summons, the trio accidentally passed into the smaller universe of E-Space.
During his travels in E-Space, the Doctor gained a new companion in the teenaged mathematical genius Adric. Romana and K9 stayed behind in E-Space as the Doctor and Adric departed for N-Space. There, they encountered a Trakenite princess named Nyssa and a human named Tegan. The foursome successfully prevented the destruction of the universe by the Master, but only at the cost of this incarnation’s life.
The Doctor prepared for the worst when the Watcher, an entity born of his own immediate future, appeared to warn him of his demise. Falling from a great height and suffering terrible injuries, he was assisted by the Watcher in his last moment, who joined with him and helped him regenerate into his next incarnation.