The Straw that Broke the Camel's Back (short story)

Summary
The Doctor discovers an alien spaceship has crashed on Earth and is determined to deal with it alone. But when the alien starts to run amok, the Doctor discovers he needs the Brigadier more than ever.

Characters

 * Third Doctor
 * Liz Shaw
 * Brigadier Lethbridge-Stewart
 * Sergeant Purvis
 * an Eriscent
 * Soldier

Continuity

 * The Brigadier recalls his first encounter with the Doctor, then in his second incarnation, in the London Underground. (TV: The Web of Fear)