K9 cam show
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.(PROSE: Love and War) He returned to Earth to end his time in the company of Sarah Jane and the Brigadier, and failed to regenerate due to the extreme damage, until K'anpo Rimpoche arrived and kick started the regeneration.(TV: Planet of the Spiders) Once he had regenerated, the Doctor suffered delirium, mumbling random things from his adventures, and was physically exhausted.
After tangling with the Master on Gallifrey, he met and travelled with Leela of the Sevateem.
However, he ended up transporting Sarah and Harry onto a galleon in space, where they were taken hostage by space pirates.
The Doctor managed to land the TARDIS before his companions were thrown into space. ) During another trip into space, Sarah Jane was kidnapped by the Verulan, and the Doctor and Harry travelled to Earth, which the Verulans had planned to attack, and sought refuge at the home of Geoff Sinton and his family.
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.