In the 2008 episode " Forest of the Dead ", River Song ( a character whose timeline intersects with the Doctor in reverse order ) says to the Doctor that she knows he would be able to open the TARDIS doors with a snap of his fingers.

* In " The War Games ", the War Chief recognises the Second Doctor despite his regeneration and it is implied that the Doctor knows him when they first meet.

The thirteen life rule is suggested to have been a rule the time lords imposed upon themselves to stop them living forever, but as he is the last Time Lord, no-one knows if this applies to the Doctor.

Out of all the staff, Johnny appears to be the closest to fellow DJ Venus Flytrap, to the point where Venus gives him financial advice, bets on horses and football games with him, and even knows which seedy bars Johnny spends time at ( for his part, Venus once claimed that he came to WKRP specifically " to work with the Doctor ").

Spock adds quietly, " He knows, Doctor.

In the episode " Blink " the Doctor knows exactly what clues to leave in the past in order to help a character in the present ( Sally Sparrow ) deal with an alien threat because she has carefully collected and preserved all the information and gives it to him after the fact.

But at least the Doctor now knows the full extent of the Ice Warrior plans.

Within the house, Rutans and Sontarans come into conflict with each other, a conflict which is resolved when the Doctor decides to give each of the two doomsday weapons to both sides, revealing that he reprogrammed one of them to target Rutans, and nobody knows whose weapon will target who.

However, only Doctor Mindbender knows the full truth of his condition as Cobra Commander funds the scientist's research in hopes to achieve immortality.

The Doctor already knows Iris as an " old friend ", and she is seen to be travelling in a 20th century London Routemaster double-decker bus ( the No. 22 to Putney Common ), which is, in reality, her TARDIS.

Despite Yellow Peri's contrary advice, Doctor Occult trusts her with the Unspoken Principum, a mysterious and universal truth that every condemned soul knows, but s / he can never communicate by any means.

Finally, Miss Augusta and Doctor Cadaverezzi ( whom she knows as Signor Rolipolio ), old lovers, reunite and marry.

When the Doctor and the Brigadier go to Think Tank, Winters tells them that K1 has been dismantled, but Winters is aware that the Doctor knows she is lying.

Despite befriending a young woman named Anne Chaplet, the Doctor knows he cannot prevent the coming massacre of 10, 000 Huguenots, including Anne, by the Catholic French authorities.

" Piper stated that at the start of the series Rose is " looking for something to happen " and that once the Doctor arrives she becomes " ruthless " in her decision to " completely drop her life as she knows it.

But in the next story, A Death in the Family, the Doctor apologizes to Hex and takes him to meet Evelyn, who tells him everything she knows about his mother.

Back on the base, the Doctor reveals what he knows about the tenth planet: it is Mondas, Earth's former sister planet and its inhabitants will soon be visiting Earth.

She knows the crystal is still on Earth and sends the Doctor there to get it for her.

The Seventh Doctor and Ace are on the trail of a monster that not only knows their every move but appears to be able to anticipate their actions too.

John tells the others that he knows the lead plotter, but he is now too powerful, so The Doctor and Ian go down to the aqueduct to find the poisoners.

Following some vague threats from the Doctor ( who is by this stage pretending that he knows exactly who Merlin is ), Mordred's knights retreat.

The first, " Nemesis of the Daleks " (# 152-155 ), with the Seventh Doctor, features an appearance of a Dalek Emperor.

Speaking with the Emperor, the Doctor addresses him as Davros, but the Emperor responds " Who is Davros?

" The Doctor initially assumes Davros's personality has been totally subsumed, but in the later strip " Emperor of the Daleks " (# 197-202 ) this Emperor is shown as a different entity from Davros.

Set prior to Remembrance of the Daleks in Davros's timeline, but after in the timeline of the Doctor, the latter, accompanied by Bernice Summerfield, together with help from the Sixth Doctor, ensures that Davros will survive the wrath of the Daleks so that he can assume the title of Emperor, allowing history to take its course.

Terror Firma seemed to contradict the events of the Eighth Doctor Adventures novel War of the Daleks by John Peel, in which an unmerged Davros is placed on trial by the Dalek Prime, a combination of the Dalek Emperor and the Dalek Supreme.

Paul Cornell's dark vignette in the Doctor Who Magazine Brief Encounters series, " An Incident Concerning the Bombardment of the Phobos Colony " occurs sometime between " Resurrection of the Daleks " and his assumption of the role of Emperor.

* Emperor of the Daleks, Doctor Who Magazine

He said, after swearing before the holy gospel, that " he was Michel De Villeneuve Doctor in Medicine about 42 years old, native of Tudela of the kingdom of Navarre, a city under the obedience to the Emperor ". The following day he said: ".. although he was not Servetus he assumed the person of Servet for debating with Calvin ".

Skaro appears in the Big Finish Doctor Who audio stories The Mutant Phase and Davros ( where we learn that Skaro had two moons: Falkus and Omega Mysterium, names drawn from a chart of Skaro's solar system in a 1976 Marks and Spencer tie-in book-Falkus is there revealed to be an artificial planet created by the Daleks as a last refuge ), and was where the Emperor Dalek operated from in The Genocide Machine, and features prominently in the I, Davros spin-off series, looking at Davros's life and the events that led to him creating the Daleks.

In the Doctor Who episode " Night Terrors " the Doctor jokingly mentions that one of the stories he enjoyed as a child was " The Emperor Dalek's New Clothes ".

The serial also continues the story arc of a civil war between rival Dalek factions, culminating in a titanic showdown between the Doctor and Dalek Emperor Davros.

The Doctor Who Magazine comic strip story Emperor of the Daleks ( DWM # 197 -# 202 ) also attempts to fill in this gap, with Davros conquering Skaro and also explaining how his remains came to be housed in the Emperor Dalek shell while the Big Finish Productions audio adventure The Juggernauts presents an alternate version of Davros's activities in the period between Revelation and Remembrance.

Thaïs and Alexander the Great are conjured by Faustus in Christopher Marlowe's play Doctor Faustus for the amusement of Holy Roman Emperor Charles V.

Dalek Emperor may refer to one of several characters in the long-running British science fiction television series Doctor Who:

The trio find their way into the Dalek city and are brought before the imposing Dalek Emperor, who reveals the true reason behind the experiments and the capture of the TARDIS: by isolating the human factor, the Doctor has succeeded in isolating the " Dalek Factor " as well.

In addition, the Emperor wants the Doctor to use the TARDIS to spread the Dalek Factor throughout human history, turning all humanity into Daleks.

The Doctor has also substituted the Human Factor for the Dalek one on the arch so the Daleks that go through will become " human " and rebel against the Emperor.

In the story, a group of marooned Daleks inform The Doctor that the rebel factions were destroyed and the Emperor again reigned supreme.

In " World War Three ", when confronted by a group of Slitheen, the Doctor threatens to " triplicate the flammability " of a bottle of port wine with the sonic screwdriver, though one of the Slitheen realises he is bluffing.

Finch tries to discredit the Doctor, who will not support the plan ; but the Doctor realises that Yates is the traitor within UNIT.

The Doctor is taken to the Caretakers HQ again, where he realises that the Chief Caretaker has been allowing the Cleaners to kill people in the Towers, but that the killing has now got out of hand and the Chief Caretaker is no longer in control.

In the city the Doctor, on reading a Geiger counter, realises that the planet is radioactive and in view of the fact that they are feeling unwell, deduces that they are developing radiation sickness.

The Doctor realises that the door is sealed by magnetism and breaks the connection with a plastic comb, but he is unaware that the escape is merely an " intelligence test " devised by the Daleks to determine who should be robotised.

In 1983, the Doctor tracks the TARDIS ' movements and realises it returned to the liner.

The Doctor realises he has no choice, and prepares to give up his remaining regenerations to not only kill the scientists but to also restore Tegan and Nyssa to normal.

The Doctor realises she has been hypnotised and disposes of the powerful bomb out of the window.

The Doctor and Liz, meanwhile, repair the reactor, and go to the underground base, where the younger Silurian realises he has been duped into sending his race back to sleep.

The Doctor realises that the Time Lords did not summon him.

The Doctor realises that the Master sent the Doctor the premonition of the assassination through the Matrix, a vast electronic neural network which can turn thought patterns into virtual reality.

As Engin plays the records of the Old Time, which describes how Rassilon found the Eye of Harmony within the " black void ", the Doctor realises these objects are not merely ceremonial.

The Doctor inspects the hypodermic needle, and realises that it contained a neural inhibitor, which mimics a death-like state but does not cause death itself.

The Doctor realises that the tombs were an elaborate trap: the Cybermen were waiting for beings intelligent enough to decipher the controls to free them.

The Doctor realises that, as the other planets are smaller than Juconda, bringing them closer to Juconda's sun will lead to catastrophe.

The Doctor realises they have been designed to withstand the heat of an exploding sun — the explosion of the Jucondan sun will scatter the eggs throughout the universe.

The Doctor realises that he can stop Sutekh controlling his Servant and the mummies by using Namin's ring and Laurence Scarman's scientific apparatus.

Arriving too late, the Doctor realises that the loss of the imprisoning force will not be felt on Earth for two minutes, that being the time that radio signals take to travel from the pyramid on Mars to the prison chamber in Egypt, and they return to Earth.

Nyssa realises that the Watcher was the future Doctor all the time.

The Doctor realises that K1 is in a state of emotional shock after killing its " father " and has developed an Oedipus complex, latching on to Sarah as the only person to ever show it kindness.

She realises that the Doctor had to do what he had to do, but it had seemed so human.

Often Jamie's simple common sense beats Zoe's strict logic, such as in The Dominators where Jamie realises that the erupting volcano is going to threaten, while the Doctor and Zoe are still congratulating themselves.