Some of these have explored and offered accounts of Christie's disappearance in 1926, including the 1979 film Agatha ( with Vanessa Redgrave, where she sneaks away to plan revenge against her husband ) and the Doctor Who episode " The Unicorn and the Wasp " ( with Fenella Woolgar, her disappearance being the result of her suffering a temporary breakdown due to a brief psychic link being formed between her and an alien ).

* The tapes for the revival of BBC show Doctor Who were labeled with the anagram Torchwood, which later went on to be used as the name for a spin-off show.

* The Ark ( Doctor Who ), a 1966 Doctor Who serial

The 2012 Big Finish Productions Doctor Who audio play The Wrath of the Iceni starring Tom Baker takes place during Boudica's uprising against the Romans.

In September 2010, MIT students attempted to put a TARDIS, the time machine from the BBC's Doctor Who, onto a roof.

The Fifth incarnation of Doctor Who, Peter Davison, was noted for wearing a stalk of celery on his lapel, claiming it at one point to be an excellent restorative, though the human olfactory sense was comparatively weak.

" He, too, has become a noted writer of his own high-profile television drama programmes, including Queer as Folk and the 2005 revival of Doctor Who.

In 1966, Kit Pedler, a medical scientist, created the Cybermen for the TV program Doctor Who, based on his concerns about science changing and threatening humanity.

* The Daleks, Cybermen and Toclafane from Doctor Who.

* The Doctor Who serial State of Decay features a vampire named Camilla who in a brief but explicit moment finds much to ' admire ' in the Doctor's female travelling companion Romana who finds she has to turn away from the vampire's intense gaze.

* " Conspiracy ", third episode of the 1965 Doctor Who serial The Romans

* The episode " The Stones of Blood ", of the 16th season of Doctor Who, the Fourth Doctor encounters the Ogri, a silicon-based life form, and in the same sub-plot, the Megara, who are made entirely out of an unknown substance, possibly energy, and they uphold the word of the law, and execute all who break the law with a beam of energy.

# REDIRECT Doctor Who

* Deimos ( Doctor Who audio ), an audio drama

Davros is a character from the long-running British science fiction television series Doctor Who.

Cast in the role of Davros was Michael Wisher, who had previously appeared in several different roles on Doctor Who and had provided Dalek voices in the serials Frontier in Space, Planet of the Daleks and Death to the Daleks.

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.

Doctor Who Magazine printed several comics stories involving Davros.

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

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.

In 2008, Julian Bleach appeared live as Davros at the Doctor Who Prom, announcing that the Royal Albert Hall would become his new palace, and the audience his " obedient slaves ".

* Enlightenment ( Doctor Who ), a 1983 Doctor Who serial

The role of Rost in the Doctor Who serial " Attack of the Cybermen " was meant for her but she allegedly had a disagreement with the production team over her fee and was replaced by Sarah Greene.

In the Doctor Who serial The Green Death ( 1973 ), The Doctor temporarily stumps BOSS by asking it " If I were to tell you that the next thing I say would be true, but the last thing I said was a lie, would you believe me?

* In the Doctor Who serial Snakedance, A Punch and Judy show is briefly recreated despite the alien setting.

He was originally assigned to design the second Doctor Who serial, The Daleks, which would have entailed realising the famous alien creatures.

It is possible that the screwdriver had appeared before Fury from the Deep without the Doctor referring to it by that name: the prop used there appears to be one used by the Doctor in many earlier stories, including the First Doctor's sabotage of Dalek equipment as early as the second serial.

The sonic screwdriver was written out of the series late in season 19, in the Fifth Doctor serial The Visitation.

The newly married Martha Smith-Jones and Mickey Smith are seen being chased by a Sontaran sniper in the last Tenth Doctor serial The End of Time, for unknown reasons.

The Doctor implies in this serial, with his protestations of being " bugged ", that the TARDIS is not normally connected to the Matrix in this manner.

The Doctor attempts to repair the circuit in " Logopolis " and " Attack of the Cybermen ", but the successful transformation of the TARDIS into the shapes of a pipe organ, a painted Welsh dresser ( much to the amusement of Perpurgilliam " Peri " Brown and the Sixth Doctor's annoyance ) and an elaborate gateway in the latter serial was followed by a return to the police box shape.

The Doctor Who serial " The Deadly Assassin ", first broadcast in 1976, introduced a dream-like computer-generated reality, known as the Matrix.

The cave was used for the filming of episodes of the BBC TV series Doctor Who: the serial Revenge of the Cybermen ( 1975 ) starring Tom Baker.

These include the Doctor Who serial The Time Warrior, broadcast in 1973 – 74, and a 1991 movie of Robin Hood starring Patrick Bergin and Uma Thurman.

Bron appeared in a brief scene in the BBC science fiction television series Doctor Who serial City of Death ( 1979 ) alongside John Cleese as art critics in Denise Rene's art gallery in Paris.

" Later, she had a more substantial guest role in another Doctor Who television serial, Revelation of the Daleks ( 1984 ).

The genesis of the novel was in two Doctor Who serials written by Adams, City of Death, ( in which an alien tries to change history at the cost of erasing humanity from existence ), and in particular the cancelled serial Shada, which first introduces a Cambridge professor called Chronotis who is hundreds of years old.

Pemberton had previously served as script editor of Doctor Who and had penned the serial “ Fury from the Deep ”.

* Dreamland ( Doctor Who ), a 2009 animated serial based on Doctor Who

In " The Robots of Death " ( 1977 ), the Fourth Doctor tried to explain this to his companion Leela, using the analogy of how a larger cube can appear to be able to fit inside a smaller one if the larger cube is farther away, yet immediately accessible at the same time ( see Tesseract ).

Stevens also produced a series of audio dramas called Kaldor City, created by Chris Boucher, which link the Blake's 7 universe into Boucher's Doctor Who serial The Robots of Death through the character Carnell ( Scott Fredericks ), whom Boucher created for the Blake's 7 episode Weapon.

The Doctor states that transdimensional engineering was a key Time Lord discovery in " The Robots of Death ".

Shows such as Doctor Who-most specifically in the episode " Robots of Death "-have also tackled the issue of technophobia, with a character in " Robots of Death " displaying a great fear of robots due to their lack of body language, described by the Fourth Doctor as giving them the appearance of " dead men walking ".

In science fiction, he wrote three Doctor Who serials in the late 1970s: The Face of Evil, The Robots of Death and Image of the Fendahl.

More recent work has included several Doctor Who novels for BBC Books, all featuring the character of Leela, and a series of straight-to-CD full-cast audio dramas entitled Kaldor City, which combine elements from his Doctor Who serial The Robots of Death with his Blake's 7 work.

* 1977: Doctor Who: The Face of Evil, Doctor Who: The Robots of Death, Doctor Who: Image of the Fendahl ( Each story released over twelve months ).

* After falling, as the Doctor lies sprawled on the ground, he sees visions of all the companions that previously accompanied his fourth incarnation: Sarah Jane Smith ( Terror of the Zygons ), Harry Sullivan ( The Sontaran Experiment ), Brigadier Lethbridge-Stewart ( Invasion of the Dinosaurs, a Third Doctor story ), Leela ( The Robots of Death ), K-9 ( The Armageddon Factor ), Romana I ( The Stones of Blood ) and Romana II ( Full Circle ).

Kaldor City is a human city of the future on an unspecified alien world, created by Chris Boucher for the Doctor Who serial The Robots of Death broadcast in 1977, and reused in his Past Doctor Adventure Corpse Marker in 1999.

In July 2012, stage play versions of " The Robots of Death ", adapted to include Kaston Iago and Elska Blayes in the place of the Doctor and Leela, and " Storm Mine ", were performed at Fab Cafe and The Lass O ' Gowrie by The Lass O ' Gowrie Theatre Company, as part of the Greater Manchester Fringe Festival.

The Doctor prevails, releasing Jamie and Zoe who override the Master Brain, causing the White Robots to destroy each other.

Collings has played historical characters such as Percy Grainger in Ken Russell's Song of Summer ( 1968 ), John Ruskin in The Love School ( 1975 ), a BBC series about the Pre-Raphaelites, and Sir Anthony Babington in Elizabeth R. He is also known for his roles in the long-running British science fiction television series Doctor Who including Vorus in Revenge of the Cybermen, Mawdryn in the serial Mawdryn Undead and Poul in The Robots of Death.

Colin Baker and Nicola Bryant returned as the Doctor and Peri, but as Michael Gough had retired, the part of the Toymaker was played by David Bailie, who had previously played Dask in the 1977 story The Robots of Death.

He has appeared in three science fiction programmes — as the second actor to portray Travis in Blake's 7 and also as Borg in the Doctor Who story The Robots of Death.

During his time on Doctor Who, he directed six serials, including three fondly-remembered adventures The Sea Devils, The Green Death and his personal favourite The Robots of Death, which was also his last involvement with the series.

The House Robots surrounded Spin Doctor and Mr. Psycho was finally able to place Spin Doctor onto the floor flipper and launch them through the air.