Doctor has trouble recognising his former mentor. In The Deadly Assassin, Announcer Runcible, an old classmate, recognises the Fourth Doctor despite his changes in appearance and mentions that the Doctor appears to have had a "face lift" since they last met. In The Armageddon Factor, Drax, another alumnus immediately recognises the Fourth Doctor, though the Doctor does not recognise him. In The Five Doctors, the Third Doctor is unable to initially recognise the Master in his non-Gallifreyan body. In The Twin Dilemma, the Doctor's old friend Azmael fails to recognise him, as the Doctor has regenerated twice since their last encounter. In The Two Doctors, when the Sixth Doctor and Second Doctor first meet, they are initially quiet until they face each other and simultaneously yell at each other, each recognising immediately the other. In Survival, the Master recognises the Seventh Doctor on sight. In Doctor Who (1996), the Eighth Doctor is unable to recognise the Master while he possesses a human body, only recognising the Master when he corrects Grace's grammar. In "Utopia", the Tenth Doctor does not recognise the human form of the Master, although the Doctor did recognise him, and name him "Master", as soon as he recovered his Time Lord physiology and mind. In "The Sound of Drums", the Doctor states that Time Lords can "always" recognise each other, although, while on Earth, the Master used satellites with a telepathic network to mask his presence from the Doctor. The Doctor in this circumstance appears to only be referring to recognition of the individual as a Time Lord, not necessarily the specific identity. However, when he sees the Master on television, he recognises him. In "Time Crash", the Fifth Doctor could not instinctively recognise that the Tenth Doctor was a Time Lord, much less one of his own later incarnations. In "The Next Doctor", the Tenth Doctor initially seems unable to detect that the human Jackson Lake, who identifies himself as the Doctor, is not actually his regenerated future self. In "The End of Time", the Doctor immediately recognises an unidentified elderly female Time Lord on sight, and also refers to the lead Time Lord by the name Rassilon (an earlier incarnation of Rassilon had appeared in "The Five Doctors"). In the context of the story, however, he may have encountered both during the Time War, though he himself has regenerated since they last saw him. Rassilon