The third Doctor Who story is the only one to have been set entirely inside the TARDIS. Also known as The Edge of Destruction and Beyond the Sun (a working title for the previous story), this story was commissioned at short notice when another script, C.E. Webber's The Giants, was pulled.

Radio Times Blurbs:

"Once again the space craft Tardis, with her family of voluntary and involuntary passengers, has succeeded in escaping unharmed from a desperate situation. Once again, the voyagers are travelling forward through time and space. But the master of the Tardis, the enigmatic Dr.Who himself is no nearer to finding a way to return with his granddaughter Susan to the place and time in which he belongs; and the problems of getting Ian and Barbara back to their home in twentieth-century Britain also remains unsolved."

"So far the uncertain course of the ship -- which is still only partially under the Doctor's control -- has taken the travellers far back in time to man's Paleolithic age on the planet Earth, when a primitive community's only hope of survival lay in its ability to make fire. And it has taken them far out into distant space, to a world shattered by a nuclear disaster where the Thals, remnants of an advanced civilisation, are battling with the soul-less Daleks."

"Now, the travellers in alliance with the Thals, have destroyed the Daleks for good, and Tardis has left the world of Skato to its true owners, But Dr. Who has decided to experiment with the ship's guidance system in a desperate effort to regain his bearings. He juggles with a new combination of levers, there is a violent explosion, and Tardis stops dead. Slowly the doors open but onto what? And, more sinister, are there only four travellers in the ship -- or has the open door admitted a fifth presence, unseen, but nonetheless powerful?"

Series	Doctor Who
Season/Story (Episodes)	1.3 (2 eps)
Created by	Anthony Coburn (Writer - based on a story by C E Webber) Verity Lambert & Mervyn Pinfield (Producers) David Whitaker (Script Editor) Based on a concept by Sidney Newman
Transmission dates	8/2/64 (The Edge of Destruction) 15/2/64 (The Brink of Disaster)
Production Code	C
Duration	47' 15"
Cast List The Doctor Barbara Wright Ian Chesterton Susan Foreman	William Hartnell Jacqueline Hill William Russell Carole Anne Ford
Setting	The story is set immediately after The Daleks and immediately before Marco Polo.
Synopsis	For a full synopsis visit http://www.drwhoguide.com/who_c.htm

Continuity Notes

Alien Races	None.
Historical Events	None.
Organisations	None.
Passing Mentions	The first Doctor had previously acquired an Ulster overcoat from Gilbert & Sullivan.
Planets & Locations	The TARDIS
Science & Technology	TARDIS; Fast Return Switch
Other adventures	The Doctor met Gilbert & Sullivan.

Contradictions & Resolutions

Links

• The story was novelised as Doctor Who - The Edge of Destruction by Nigel Robinson in 1988.