Tegan Jovanka was an Australian air stewardess, and the main companion of the Fifth Doctor, although she initially met the Fourth Doctor on his final adventure. She quickly became embroiled in the events surrounding the Doctor's regeneration and found herself a unwilling passenger of the Fifth Doctor with Adric, and Nyssa, as the Doctor failed to successfully return her to her proper time and place. Some time after being returned to Heathrow, she reunited with the Doctor in Amsterdam, and rejoined him and Nyssa.
During her adventures with them, she was troubled by her possession by the Mara. Some time later, they were joined by Turlough, and later Kamelion, who she was somewhat suspicious of. As well as this she encountered the Brigadier a few times. The second occasion was when she played the Game of Rassilon in the Death Zone on Gallifrey, where she also met the First, Second and Third Doctors, along with Susan Foreman and Sarah Jane Smith.
History
Backstory
to be added
Logopolis
to be added
Season 19
to be added
Season 20
to be added
Season 21
to be added