Sarah Jane Smith, played by Elisabeth Sladen, appeared in three seasons of Doctor Who.
- Season 11 (1973-1974) - Sarah Jane joined the Doctor, played by Jon Pertwee, in the season opener The Time Warrior and remained his companion until Planet of the Spiders, which marked the end of Jon Pertwee's run as the Doctor.
- Season 12 (1974-1975) - Sarah Jane continued her adventures with the Fourth Doctor, played by Tom Baker, in the season opener Robot. She departed the series in the season finale, The Hand of Fear.
- Season 13 (1975-1976) - Sarah Jane made a brief return for the season opener, The Time Warrior (not to be confused with the season 11 episode of the same name).
While Sarah Jane had a significant presence in the classic series, she also returned to the Doctor Who universe in several specials and spin-off series, including The Sarah Jane Adventures.
