The Doctor's Timeline

The First Doctor

Season 1

Title	Code	Companions	Location(s)	Date(s)	Notes
An Unearthly Child	A	Susan Foreman; Ian Chesterton; Barbara Wright	Earth	November 1963; 100,000 BC	-
The Daleks	B	Susan; Ian; Barbara	Skaro	300 AD	Takes place directly after An Unearthly Child
The Edge of Destruction	C	Susan; Ian; Barbara	The Doctor's TARDIS	-	Takes place directly after The Daleks
Marco Polo	D	Susan; Ian; Barbara	China, Earth	1289	Takes place directly after The Edge of Destruction
The Sorcerer's Apprentice	MA 12	Susan; Ian; Barbara	-	-	Takes place directly after Marco Polo
The Keys of Marinus	E	Susan; Ian; Barbara	Marinus	1964	Takes place after Marco Polo