Open on a police box, power-hum over. Camera moves in to the box, and the hum gets louder. We can read the instructions clearly: "For the use of general public..." Etc etc. (By the way, disregard what you may have heard about police boxes no longer being in use. I saw a few around London, although they are far more stream-lined than the Doctor's model. I never saw one up really close, but I'm pretty sure they're the "grab the receiver" models and not "get inside" types.)

Dissolve to a school, where Ian (science teacher) and Barbara (history teacher) are discussing a pupil they have in common – the disgustingly bright 15 year old Susan Foreman.

Barbara has discovered that Susan lives at a non-existent address – 76 Trotters Lane, actually an old junk yard.

When we see Susan, she is listening with enthusiasm to Beatle-type music on a transistor radio. Ian offers her and Barbara a lift home, which Susan refuses on the grounds that she likes walking through the dark because it's mysterious.

As Ian and Barbara go, Susan glances through a book on the French Revolution and mutters "That's not right."

Dissolve to Ian and Barbara in a car, lurking outside 76 Trotters Lane, waiting for Susan so they can see where she goes, While they wait they have flashbacks about Susan. "But Mr Chesterton, you can't solve that problem using only three dimensions," and "I'm sorry, I thought Britain was on a decimal system. You will, but you just don't use it yet."

Susan appears, goes into the only entrance to the junk yard, and never comes out again. Barbara and Ian follow, and can find no trace of Susan. (As it develops they never come out either.) All that's there is a lot of old junk, even an old police box, but no sign of where Susan went. Ian touches the police box, and exclaims "It's alive!" Because that ferlushinger background hum is there again, and the box has what he calls "a faint vibration."

At that moment enter Hartnell. Susan calls out from inside the police box, thereby demonstrating the TARDIS is not soundproof, The doctor denies hearing anything, and stalls like mad until Susan calls out again. Convinced the Doctor is holding her prisoner in the little box, Ian bursts in.

The control room of the TARDIS looks exactly the same as the modern one, at first glance, (Also second and third glances,) There are a number of dazzling flashes. These have nothing to do with the TARDIS...it is just that a number of twits in the audience are taking pictures of the screen... with flash cameras.

While Ian and Barbara are in a state of shock, the Doctor instructs Susan to shut the door. (The background hum is quite prominent and stays that way,) muttering that he was afraid something like this would happen if they stayed in one place too long, the Doctor replaced the filament that has kept the TARDIS marooned in 1963 for five months.)

The Doctor refers to the TARDIS as "the ship".
IAN: "Ship? You mean this thing goes somewhere?"
DOCTOR: "Well it doesn't run around on wheels you know."

Susan explains that she calls it the TARDIS, "I made it up from the initials – Time And Relative Dimensions in Space."

Ian tries to leave, and in the process notices that he is shut in, He tries to open the door by tossing a switch on the control panel – and winds up flat on his back because the controls are "live". That's some control panel – the Doctor must wear rubber soled shoes.) Susan tries to talk her grandfather into letting the two teachers leave, The Doctor is anxious to avoid – any publicity Ian and Barbara may spread. "We are wanderers in the fourth dimension...without friends or protection, But one day we can go back. Yes, one day. One day." (Troughton claimed to be a voluntary exile. Sure, and I'm a cybermat!)

The Doctor agrees to release Barbara and the unconscious Ian (some electric shock there) and goes to the central control column. The TARDIS wheezes and groans and on the viewscreen London drops away. (That's right, drops away.) Psychedelic patterns are superimposed over the faces of the passengers, while the dematerialisation sound effects go on lengthily.

Silence but for wind. The TARDIS sits in the open desert, at an angle off the vertical, a shadow falls across the foreground.

Part two of Unearthly Child had its own name, which I forgot to jot down. (In those days they used to name each episode.)

Cave people are trying to rediscover the lost secret of fire-making, as an ice-age is coming fast,

Meanwhile, back in the TARDIS, (perfectly horizontal on the inside), Ian regains consciousness. The Doctor doesn't know when they are – the yearometer has packed in.

Ian: "Open the door, Doctor Foreman."
Doc: "Eh? Doctor who?"

After a quick check of atmosphere and radiation, the Doctor and co. exit.

Doc: "It's still a police box. Why hasn't it changed? Dear dear how disturbing."

The Doctor goes off by himself and lights his pipe – an act which freaks out the caveman whose shadow we saw earlier. He raps the Doctor on the head and carries him off, causing him to lose pipe and matches. One way to kick the smoking habit, I suppose.

And so it goes.