The Doctor attempts to explain that they are aliens, but Nyder refuses to believe it as their greatest scientist, Davros has stated there is no life outside of Skaro.

Davros is an archenemy of the Doctor and is the creator of the Doctor's deadliest enemies, the Daleks.

The concluding episodes of the fourth season, " The Stolen Earth "/" Journey's End ", reveal that Davros was thought to have died during the first year of the Time War, when his command ship " flew into the jaws of the Nightmare Child " at the Gates of Elysium, despite the Doctor's failed efforts to save him.

Terry Molloy has reprised his role as Davros in the spin-off audio plays produced by Big Finish Productions, mostly notably Davros ( taking place during the Sixth Doctor's era ), which, through flashbacks, explored the scientist's life prior to his crippling injury, which is attributed to a Thal nuclear attack ( an idea that first appeared in Terrance Dicks ' novelisation of Genesis of the Daleks ).

Angered by the Doctor's insults, Davros decides to unleash the device on Skaro's sun.

The unnamed protagonist ( listed in the credits as " The Stranger ") was played by Colin Baker, his assistant Miss Brown by Nicola Bryant, who had played the Doctor's assistant Peri Brown opposite Colin Baker for two years, and the villain of the piece by Michael Wisher, who had been the first actor to play Davros.

They are captured by Davros, who becomes aware of the Doctor's knowledge of the Daleks ' future.

After the Doctor's companion Donna ( Catherine Tate ) defeats Davros, Mickey is one of several former companions who pilot the TARDIS.

Davros makes them see that the Doctor's logic is " impaired by irrational sentiment " and the Daleks comply.

The plot concerns the Sixth Doctor's attempts to determine whether Davros is sincerely helping an Earth corporation benevolently, or if he is up to more dangerous schemes.

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.

* The Eighth Doctor Adventures novel, War of the Daleks by John Peel, claimed that Skaro had not been destroyed after all ; having discovered records of Skaro's destruction during their invasion of Earth, the Daleks moved Davros to another planet while he was in stasis after terraforming it to resemble Skaro, thus allowing the destruction of ' Skaro ' to take place on their terms.

When Lytton leaves to discuss this with the Supreme Dalek, Davros uses a hypodermic-like mind control device to take control of Kiston.

Davros tries to get the Daleks to take the Doctor as well, but they do not recognise him in this regeneration.

* The novel War of the Daleks effectively retconned this story to take place not on Skaro, but a planet called Antalin, the Daleks having moved Davros to this planet before his recovery as part of an elaborate plan to avert the destruction of Skaro in Remembrance of the Daleks ( Having found records about Skaro's destruction during The Dalek Invasion of Earth ).

Later in the series when Davros is revived, he decides to take over the leadership of the Daleks himself, resulting in a schism within the Empire with one faction remaining loyal to the Dalek Supreme and another faction serving Davros.

Davros uses a trick to wipe out those who oppose him, by ordering a vote to decide whether to continue with the project, when the Daleks arrive they kill those who voted against Davros, but ultimately turn on Davros and apparently kill him at the conclusion of the serial.

Believing his creations to be treacherous, Davros begins using mind control on Daleks and humans, ultimately releasing the virus to kill off the Daleks before they can exterminate him.

Davros emerges as " The Great Healer " of the funeral and cryogenic preservation centre Tranquil Repose on the planet Necros in the Sixth Doctor story Revelation of the Daleks, where he uses frozen bodies to engineer a new variety of Daleks loyal to him, distinguished from the original Daleks by their white and gold livery and slightly changed design.

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

The Curse of Davros begins with Davros and the Daleks working together to try and alter the outcome of the Battle of Waterloo using technology that Davros has created that allows him to swap peoples ' minds, with matters becoming more complicated when the Sixth Doctor uses the device to swap bodies with Davros in an attempt to subvert the Daleks ' plans from the inside.

His mental instability has grown to the point where " Davros " and " the Emperor " exist within him as different personalities.

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.

The story initially leads the informed viewer to identify the figure speaking to Ratcliffe and commanding the renegade faction as Davros, and to identify the imperial faction with the Daleks who captured Davros at the end of Revelation of the Daleks, with the stated intention of taking him to Skaro for trial.

On the vote, the remaining Kaled elite are split between Davros and Gharman, and fighting breaks out between them with Davros using the Daleks to kill those against him.

* Before the Doctor falls from the dish, the enemies that mock him are the Master ( as seen in The Deadly Assassin ), a Dalek ( Destiny of the Daleks ), the Pirate Captain ( The Pirate Planet ), the Cyberleader ( Revenge of the Cybermen ), Davros ( Genesis of the Daleks ), a Sontaran ( The Invasion of Time ), a Zygon ( Terror of the Zygons ) and the Black Guardian ( The Armageddon Factor ).

However, Davros had previously recruited one of the Spider Daleks as a sleeper agent for just such an eventuality, and even he was not certain in the end if he was being disintegrated or being teleported away to safety, leaving the possibility open for his return.

Davros is a megalomaniac who believes that through his creations, the Daleks, he can become the supreme being and ruler of the universe.

However, the Dalek force is destroyed by the Doctor, and Davros is captured and imprisoned by the humans in suspended animation, before being taken to Earth to face trial.

However, a Dalek on the bridge of Davros ' ship reports that the Emperor's escape pod is being launched and a white light is seen speeding away from the ship moments before its destruction, leaving a clear route to bring Davros back in the future.

Davros was pulled out of the Time War by Dalek Caan despite it being time-locked, and bred a new Dalek race using cells from his own body, so that he has little skin and flesh left on his chest and his ribcage and internal organs are visible.

Though Davros talks about his " new empire ", he at one point in time has actually been overthrown by his creatures and is kept prisoner in the Vault, being used for his scientific knowledge.

Davros and the Daleks plan to detonate a " reality bomb ", a wavelength transmitted by the stolen planets which cancels out the electrical field binding atoms, reducing the whole of creation, even other Universes due to the Medusa Cascade being a rift, to nothingness except for the Daleks and the Crucible, in order to achieve " ultimate victory ".

However, the Daleks return in " Bad Wolf "/" The Parting of the Ways " ( 2005 ), and subsequently in " Army of Ghosts "/" Doomsday " ( 2006 ), " Daleks in Manhattan "/" Evolution of the Daleks " ( 2007 ), " The Stolen Earth "/" Journey's End " ( 2008 ) and " Victory of the Daleks " ( 2010 ), the penultimate of these being the series 4 finale where Davros also returns, and the final of these being the first time the Eleventh Doctor meets the Daleks.

* The Skaro Daleks of Revelation become the Renegade Daleks in this story, and the story does not explain how Davros went from being their prisoner to being the Emperor of a rival Dalek faction.

In Revelation of the Daleks ( 1985 ) Davros creates an army of Dalek mutants by manipulating DNA extracted from humans on the planet Necros, where the terminally ill and the dead are being stored in suspended animation.

In John Peel's novel War of the Daleks they are depicted as creations of Davros and described as being slightly larger than a standard Dalek, with eight legs emerging from the lower half.

It is revealed that Dalek Caan was able to teleport back to the Time War ( apparently a feat thought impossible due to the events being ' time-locked ') and was able to save Davros from his apparent destruction during the first year of the conflict.

The Sixth Doctor arrives and insists that Davros cannot be trusted, that he is " one of – no, actually, the most evil being this galaxy has ever produced!

* The plot point of Davros being given the opportunity to commit suicide shortly after the attack which left him crippled originally appeared in the 1990 novelisation of Remembrance of the Daleks, written by Ben Aaronovitch.

Davros proved too effective a character to be kept dead and was resurrected four years later in 1979's Destiny of the Daleks ( played by David Gooderson using the mask Friedlander made for Wisher-the mask had to be split into sections and rejoined to get as good a fit as possible ).

In the Fifth Doctor story Resurrection of the Daleks, a small Dalek force aided by human mercenaries and Dalek duplicates liberates Davros ( now played by Terry Molloy, with a new mask designed by Stan Mitchell ) from his space station prison, needing his expertise to find an antidote for a Movellan-created virus that has all but wiped them out.

During Doctor Who Confidential Russell T Davies explained how he believes Davros to have survived the Crucible's destruction in some way, not specifically showing his death for this reason.

Terry Molloy played Davros in the remounting of the play, again with Peter Miles for another one-off production, mounted in 2005.

In truth, he was laying a trap for the Daleks and their creator, Davros.

Davros had hoped to use the Hand to transform the sun of the Dalek homeworld Skaro into a power source for time travel.

The serial, which sees the swanky space-age necropolis Tranquil Repose turned into a front for the Dalek breeding activities of the maniacal Davros, has set designs and scenes which clearly reference the 1965 film, while the characters Joyboy, Thanatogenos and The Blessed Reverend all have direct analogs in the episode.

The Emperor is revealed to be Davros who announces his plans for his Daleks to overthrow the Time Lords.

However, for instance, Big Finish was no longer allowed to use the character of Davros following his return to the series in 2008, although this ban has been lifted and Davros returned to Big Finish in The Curse of Davros, released in January 2012.

Former BBC director and producer David Maloney claimed on the DVD commentary for Genesis of the Daleks that John Birt " succeeded where Davros failed and ruined the BBC ".

Davros explains to Lytton that his cryogenic sentence lasted for " 90 years of mind-numbing boredom.

Despite Lytton's reservations, Davros demands that he remain on the prison ship while working on the virus, as it may be necessary for him to be refrozen.

Rather than depart, the Doctor decides he must destroy Davros once and for all.

Orcini accepts the contract solely for the honour of killing Davros.

Meanwhile Tasembeker, who has been coerced by Davros to spy on Jobel, attempts to warn the Chief Embalmber out of misplaced love for him.