7. Utopia
Ah, the Master. The Doctor's archenemy, from the suave Roger Delgado to the bearded Anthony Ainley, the renegade Time Lord had graced the original stories in plots ranging from the fantastic to the weird and wonderful. However, after bringing back the Daleks and Cybermen in the first two revived series, Russell T. Davies had to bring back another original enemy... and we were introduced to the next incarnation, played excellently by John Simm. At the end of the universe, humanity's desperate attempts to survive are being helped by a Professor Yana, but when the Doctor arrives, it awakens strange memories, and the constant drumming in his head is eventually solved to be the footprint of the Master... What makes this episode good is the pacing. It goes from relatively slow in the middle as the mystery surrounding the Professor begins to grow and the Doctor puts every ounce of intelligence to helping the rocket fly, to fast-paced and gripping, particularly at the end, when the emotions of the Doctor spiral out of control when he realizes that he is indeed not alone. The inclusion of Captain Jack Hawkins, combined with the sudden questioning of Martha to the Doctor, makes this episode both enjoyable and tense, and sets up the Series 3 finale - which proves to be one of the best.