1. 'That's Not Right!'
From: "An Unearthly Child" (a.k.a. "100,000 BC")
Premiere: November 23, 1963
In three words, Susan Foreman (Carole Ann Ford) foreshadows the enormous premise of a new BBC series meant for children. Susan, the granddaughter of a mysterious, crotchety old man later identified as the Doctor (William Hartnell), has borrowed a book about the French Revolution from her solicitous schoolteachers, Ian Chesterton (William Russell) and Barbara Wright (Jacqueline Hill). Flipping through its pages, she immediately spots errors. Is she unusually bright? Or was she perhaps there to see those events unfold firsthand? It was Susan who coined the acronym TARDIS – "Time and Relative Dimension in Space" – for the archaic, temperamental blue police box in which the Doctor and his companions travel. The rest is history — and the present and the future.