In the console room of the TARDIS, the Doctor becomes
very distressed at the readings on the instrament panels. When Sarah queries
his strange behaviour, he replies that the relative dimentional computer
has malfunctioned. In short, the steering's gone haywire. Examining the
chronometric astrometer, the Doctor estimates that Earth Time will run
out soon. The TARDIS stops, in the grip of some unknown force 4,500 million
years into Earth's past, the very beginnnings of the planet. The Doctor
realises this, and he and Sarah board a two person capsule to venture outside
to observe it.
They make their way out into space, observing the unformed
Earth. At this stage it is much bigger than the Earth of Sarah's day, an
enormous mass of pulsing, burning gases. After observing this, the Doctor
and Sarah pilot the capsule back to the TARDIS.
Back in the console room, Sarah comments on the frightening
nature of the Earth's beginnings. Using cosmo-retrozine, the Doctor frees
the TARDIS from the force gripping it, travelling along the progression
trail of the developing Earth.
The TARDIS travels a few million years forward when it
is caught in the pull of a huge force again. The Doctor and Sarah board
the capsule to see how the Earth has progressed in those few million years.
Once outside the TARDIS, Sarah notes that the Earth has
gotten smaller. The Doctor notes that it is closer to the size of Sarah's
Earth, due to the erosion effect of sun action. The Earth has also begun
to solidify, bringing order to the planet.
Hissing noises and thunder interrupt their conversation,
but the Doctor dismisses it as lightning, noting that the first crust is
forming on the Earth. A deep, echoing voice rises up, demanding to know
the reason for the Doctor and Sarah's intursion. The Doctor replies that
they are travellers. The voice reveals itself to be that of "Lord Megron,
High Lord of Chaos, Chief of the Carions, Lords of Chaos." The Doctor mentions
that he is a Time Lord, to which Megron replies that the Carions and the
Time Lords have been enemies down through the ages. He states that he has
taken over the firey Earth in order to perserve tis disorder for all time.
To this the Doctor replies that order is already progressing from this
tumult. This angers Megron, wishing that they be punished. The Doctor dismisses
this lightly and Megron fires a thunderbolt. Tha capsule is unharmed. It
returns to the TARDIS.
The TARDIS takes off, travelling along Earth's progession.
Some million years later, the TARDIS slows and stops at another stage in
The Doctor and Sarah again enter the capsule and head
out into space. They have different reactions to the scene before them.
The Earth is being ripped apart by volcanoes. Sarah thinks its horrible,
but the Doctor says it's marvelous.
By means of the compressive telesight, which allows events
of millions of years to be viewed in minutes, they witness the volcanoes
boiling the rock into cream, shuffling materials, moulding the Earth. Sarah
feels sick and frightened, but the Doctor dismisses this and marvels at
the forming Earth. Tidal wave covers contenents and mountains rise from
the Earth. The Doctor comments that order is forming. To this Megron appears
and dismisses it, referencing the vocanoes and lack of breatheable air.
The Doctor taunts him with the word "order." Megron is enraged and parades
his title "High Lord of Chaos." The Doctor points out that the Earth is
generating its own gases, including a bit of oxygen. Megron denies this.
The Doctor points out that the forming granite crust. Progess. Order. The
Doctor states that life will take over the planet, which upsets Megron
The Doctor and Sarah move back into the TARDIS and continue
on Earth's progression.
The TARDIS lands. The doors open, allowing an inrush of
sweet air. The Doctor and Sarah step onto the Earth.
The landscape is much more idyllic than what was seen
beforehand. Trees, hills, and flowers are everywhere. Sarah asks what happened.
The Doctor explains that this is the result after millions of years from
the previous stage. Oxygen is abundant, generated from sunlight by plants.
Sarah wonders where Megron is, which prompts him to speak. The Doctor challenges
him to a duel by means of Telepathic Will Deployment. The Doctor wins and
banishes Megron from Earth. Megron goes maintaining that "Chaos will come
again." The Doctor and Sarah say "Bye bye" to Megron.