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 ".

: Rufus Sewell read a 10-part audio adaptation combining and abridging Doctor Syn on the High Seas and Doctor Syn Returns for BBC Radio, broadcast on BBC Radio 7 in December 2006 and repeated in June 2007.

: A 10-part audio adaptation of The Further Adventures of Doctor Syn ( combining and abridging The Further Adventures of Doctor Syn and The Shadow of Doctor Syn ) read by Rufus Sewell was performed on BBC Radio 7 in December 2007.

The Doctor V64 also had the ability to play Video CDs, audio CDs and had an option for applying stereo 3D effects to the audio.

The Davros Mission is an original audio adventure ( without the Doctor ) available on the Complete Davros Collection DVD box set.

By the time of the Eighth Doctor audio play Terror Firma ( set after Remembrance ), Davros is commanding a Dalek army which has successfully conquered the Earth.

Category: Doctor Who audio characters

The Seventh Doctor is Time's Champion ( as well as someone who makes frequent deals with or wages against Death to save his friends ) and the audio play Master states that the Master is Death's champion.

It is unclear what the attitude of the new Doctor Who television series is toward the information in the novels and audio plays, the latter produced by Big Finish Productions.

However, a number of writers of the novels and audio plays are also writing for the new television series, and Russell T Davies refers to the comic strips, audio plays and novels in an essay describing the Time War, written for the Doctor Who Annual 2006.

* Hex ( Doctor Who ), a character in the Big Finish Productions audio plays based on the television series Doctor Who

* Phobos ( audio drama ), a 2007 audio drama based on Doctor Who

* In the Big Finish audio drama Pier Pressure, Evelyn Smythe mentions that although the Sixth Doctor didn't possess a sonic screwdriver, he fondly remembered it as his " door key ".

Big Finish Productions first used the Sontarans for their audio drama Heroes of Sontar-a 2011 Fifth Doctor story.

* The Sandman ( Doctor Who audio ) ( 2002 ), a 2002 audio drama

The sixth production, Theatre of Fear, included De Lorde's famous adaptation of Poe's The System of Doctor Tarr and Professor Fether ( Le Systéme du Dr Goudron et Pr Plume ) as well as two original plays, Double Crossed and The Good Death alongside The Tell Tale Heart.

Category: Eighth Doctor audio plays

Catherine Hicks plays Doctor Gillian Taylor, a biologist on 20th century Earth.

Although McGann played the Doctor on television only once, he gave permission for his likeness to be used on the covers of the BBC's Eighth Doctor novels and he has reprised the role of the Eighth Doctor in an extensive series of audio plays by Big Finish Productions.

Following on from this, she is featured in a number of audio plays with former Doctor companion Leela ( played by Louise Jameson ) under the umbrella title of Gallifrey.

Wodehouse, Dr. Simon Sparrow in BBC Radio 4's adaptions of Richard Gordon's Doctor in the House and Doctor At Large ( 1968 ) ( currently repeated on BBC Radio 4 Extra ), a retired thespian in a series of six plays with Stanley Baxter Two Pipe Problems, and later the play Not Talking, commissioned for BBC Radio 3 by Mike Bartlett.

Gillingham plays Sherlock Holmes to his younger counterpart's Doctor Watson ; they progress almost playfully through the novel while the clues mount up and the theories abound.

He has performed in many audio plays, starring in the Doctor Who " Unbound " play Sympathy for the Devil ( 2003 ) as an alternative version of the Doctor, and in a series of plays based on ITV's Sapphire & Steel as Steel, both for Big Finish Productions.

She has also reprised her role as Ace in the charity special Dimensions in Time and the Doctor Who audio plays produced by Big Finish Productions.

At the Glastonbury Festival on 27 June 2010 to close their set, Matt Smith, who plays the Eleventh Doctor, came on stage and performed with Orbital using the sample of the Doctor Who theme tune.

* The Earth also plays a major part in the Doctor Who universe.

He has also returned to play the Seventh Doctor in a series of audio plays by Big Finish Productions.

Also of interest are records of the purchase of expensive costumes and of stage properties, like the dragon in Christopher Marlowe's Doctor Faustus, which provide insight into the staging of plays in the Elizabethan theatre.