[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/chase_6664.jpg]]
[[caption-width-right:350:The Main Event: Saltshaker vs. Ball]]
-> ''Don't just stand there and scream, you little fool, run!''
-->-- '''Ian''', to Vicki, speaking for a nation.

Watching the Space/Time Visualiser (a souvenir from last week's "[[Recap/DoctorWhoS2E7TheSpaceMuseum Space Museum]]"), the Doctor and friends watch Music/TheBeatles, then discover that there's a Dalek time machine on their tail.

In a chase through time and space, the TARDIS with the Daleks in hot pursuit lands on the desert planet Aridius, on top of the Empire State Building, on the deck of the ''[[GhostShip Mary Celeste]]'' - the appearance of the Daleks causes the crew to abandon ship - and a fairground haunted house.

We eventually end up on the jungle planet of Mechanus, where a group of robots called Mechonoids take the travelers prisoner. They were sent fifty years earlier to build a city ready for a human colony to arrive and take possession. The colonists never showed up, but the Mechanoids continue to defend the city in readiness. The Doctor and companions meet Steven Taylor, a human astronaut who has been the Mechonoids' prisoner for some time.

The Mechonoids and Daleks battle, mutual destruction ensues, and Ian and Barbara decide to use the rather more reliable Dalek time machine to get home to 1960s London, reluctantly helped by the Doctor.

Steven Taylor stows away on the TARDIS, and is not discovered by the Doctor until the following serial.

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This story holds the record for most companions in a single episode in Classic Who, an honour it shares with "The Daleks' Master Plan" if you count Bret. It was surpassed by the Tenth Doctor story "Journey's End" in New Who.

The Mechonoids reappear 40 years later, in the AudioPlay/BigFinishDoctorWho audio play [[Recap/BigFinishDoctorWho065TheJuggernauts "The Juggernauts"]].


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!Tropes
* {{Chronoscope}}: The Time-Space Visualiser.
* ClapYourHandsIfYouBelieve: The Doctor's theory on the (supposedly?) House of Horrors. Although the Daleks clearly believe they're on Earth, their weapons ''do not seem to incapacitate supposedly "fun-fair" dummies'' and ''one of them even throws a Dalek upsidedown'' and ''make them run in fear''.
** SuperPoweredRobotMeterMaids: The Expanded Universe later included, somewhere between AuthorsSavingThrow and a BrickJoke, a report that the company involved had been criticised for manufacturing gratuitously dangerous robots. (Whether this is canon or not remains to be seen.)
* ClumsyCopyrightCensorship: The Region 1 DVD release has two minutes cut from Episode 1 in order to avoid paying for the rights to include a short scene with the Beatles. Thankfully, the episode is uncut in Region 2.
* ContinuityNod: Barbara protests when Ian destroys her cardigan [[Recap/DoctorWhoS2E7TheSpaceMuseum again]].
** Also, the [[spoiler:fake]] Doctor telling Ian to kill the duplicate with a rock - like the Doctor almost did in on the very first serial.
* EarnYourHappyEnding: Barbara and Ian finally arrive home after two years. At the time of the show's run, it would be assumed that this is a long time to be time-hopping and that they should have arrived sooner.
* EvilKnockoff: The Daleks' android version of the Doctor.
* EvilVersusEvil: Daleks vs the Mechonoids.
* FridgeHorror: If the inhabitants of the Haunted House [[spoiler:‘attraction’]] could take out some '''MOTHERF✳✳KING DALEKS❗❗''' Right off the bat, without preparation, beating the rest into a hasty retreat – imagine what happened to [[spoiler:the patrons.]]
** FridgeBrilliance: [[spoiler:Why do you think it was closed―down❓]]
* FakeShemp: In a bizarre example of this trope, William Hartnell's regular body double Edmund Warwick was recruited to play the Daleks' android version of the Doctor later in the story. Unfortunately, the director didn't attempt to disguise the fact that Warwick didn't look anything like Hartnell from the ''front'', resulting in an effect somewhat akin to the body doubling from ''Film/Plan9FromOuterSpace'' as the android changes from being played by Warwick to being played by Hartnell (and back) from shot to shot.
** Oddly, the concept may have worked had they just let Warwick be the Doctor and speak some lines - the reason for such being that the Daleks' technology was faulty, so their Doctor not only ends up calling Vicki "Susan" but his face doesn't actually resemble Hartnell's.
** Making things that much stranger, there's an occasion where the trope is actually carried out correctly -- Warwick plays the ''real'' Doctor at one point during the fifth episode (specifically, when the Doctor and Ian are carrying the unconscious Vicki into a cave), and unless you look very closely at the Doctor's face throughout the sequence you probably wouldn't realize that it was actually Warwick playing him.
* GhostShip: The ''Mary Celeste''.
* GoMadFromTheIsolation: Steven.
* GoMadFromTheRevelation: Apparently, the country boy tourist. Or he just thought the Daleks were completely ridiculous.
* HauntedHouse: Subverted, since it's really a closed funfair exhibit. The Doctor and company never learn this, and neither do the Daleks.
* HistoricalInJoke: The ''Mary Celeste'', again, as she really existed and really was a GhostShip.
* HongKongDub: Hartnell voices the android double of the Doctor even in the scenes where the double is played by Warwick. Since the BBC's production methods at the time didn't allow for voices to be dubbed on in post-production, this meant that Hartnell had to record the robot's dialogue ahead of time, and the dialogue was dubbed in live during filming. Since Warwick didn't have any reference point for when the dialogue was being played, the dubbing is less than accurate.
** To be completely fair, however, this actually further works to show how faulty the Dalek's technology was. Completely unintentionally, of course.
* InfantImmortality: Shockingly averted. A woman who jumped overboard on the ''Mary Celeste'' was carrying a baby.
** This may be a case of small-scale ShownTheirWork. Among the people who disappeared from the ''Mary Celeste'' were the captain's wife and two year-old daughter.
* JustAStupidAccent: Oh God, the "American" accents. Like it was so hard to hire some barely-professional American extras who happened to be in England at the time. You don't have to be a native speaker to realize they would've been better off to ignore the issues of accents altogether.
* [[ManEatingPlant Man-Eating Fungus]]: Mechanus is covered in them.
* NarratingTheObvious: The protagonists are chased through time by a group of Daleks in their own time machine and make a brief stop on a sailing ship, and when the Daleks show up they fight and kill the crew before resuming the chase. The camera then pan over the now deserted ship before stopping on the name plate, which reads "Mary Celeste". That's kinda funny, right? Cut to inside the TARDIS, where Ian tells Barbara that the ship was, in fact, the Mary Celeste. Maybe the writers were afraid the audience looked away at the wrong moment.
* OptOut: Ian and Barbara, rather than continue with the Doctor, use the Daleks' time machine to return to their home time (or close to it).
* PitTrap: Ian constructs one to catch the Dalek guarding the TARDIS in episode 2.
* RobotMe: The Daleks' robot double of the Doctor, designed to assassinate the time travelers.
* SanDimasTime: The TARDIS and the Dalek time machine always arrive in the right order, despite the fact they travel through time. And Ian and Barbara arrive in London two years after they left, after having traveled with the Doctor for two years.
* SelfOffense: Vicki knocks out Richardson, who has caught Barbara. Then Barbara and Vicki mistake Ian for a sailor.
* SingleBiomePlanet: From what we see of both, this trope applies to Aridius (desert planet) and Mechanus (jungle planet).
* SternChase
* StockAudioClip: During the Daleks' fight with the Mechanoids, all the lines spoken by the Daleks are from earlier in the serial (in fact, mostly from their first scene in the first episode).
* StockEpisodeTitles: An odd example, since none of the individual episodes is called "The Chase" - the serial name, however, has 30 uses.
* TapOnTheHead: Used by Vicki to knock out Richardson. [[SelfOffense And Ian]].
* TonightSomeoneDies: "The Death of Doctor Who". The robot dies.
* TwoOfYourEarthMinutes: Even when only speaking to each other, the Daleks talk about time in 'Earth minutes'.
* VisibleBoomMic: Not the boom mic, but Ian walks right into the camera's shadow when he and the Docter are exploring the 'haunted house'.
* WackyAmericansHaveWackyNames: Morton Dill.
* YouHaveToBelieveMe: Alas, poor tourist.
* YouLookFamiliar: Peter Purves plays both Morton Dill and Steven Taylor, new companion introduced in Episode 6.