The Fourth Doctor was portrayed by Tom Baker for seven consecutive seasons and remains the longest-lived incarnation of the Doctor in the show’s on-screen history, counting both the classic and modern series. Further to this, he is considered to be the most recognisable incarnation of the Doctor both in the United Kingdom and internationally.
The Fourth Doctor has been characterised as a clownish adventurer, eager to dish out jokes and jelly babies. It’s a notion that neglects so much about this fascinating incarnation – this Doctor’s remote, alien nature, his apparent coldness and the fact that his tomfoolery often served to wrong foot his enemies.
His initial companion was intrepid journalist Sarah Jane Smith (Elisabeth Sladen), who had travelled alongside him in his previous incarnation, and she is later joined by surgeon Harry Sullivan (Ian Marter). His later companions included robotic dog K-9, savage alien warrior Leela (Louise Jameson), female Time Lord Romana (Mary Tamm and Lalla Ward), alien aristocrat Nyssa (Sarah Sutton), boy genius Adric (Matthew Waterhouse) and Australian flight attendant Tegan (Janet Fielding).