First Doctor (William Hartnell)

The young Gallifreyan grew up very quickly and she's not really The Doctor's granddaughter -

http://en.wikipedia.org/wiki/Susan_Foreman

The first human to discover what being bigger on the inside means, the cool teacher is happy either side of the cane -

http://en.wikipedia.org/wiki/Barbara_Wright_(Doctor_Who)

The action man science teacher who can survive in any situation has the hots for Babs but is willing to share -

http://en.wikipedia.org/wiki/Ian_Chesterton

25th century orphan who becomes the subject of a Shakespeare play as Cressida -

http://en.wikipedia.org/wiki/Vicki_(Doctor_Who)

He takes a moral stance on most things and is willing to enforce it rather than think about it -

http://en.wikipedia.org/wiki/Steven_Taylor_(Doctor_Who)

The Trojan literally worships The Doctor; it is unclear how she was saved -

http://en.wikipedia.org/wiki/Katarina_(Doctor_Who)

It is unclear whether the ditzy teenager is still under hypnosis -

http://en.wikipedia.org/wiki/Dodo_Chaplet

The sixties 'it' girl: posh, hip, unpredictable, glamorous and vivacious top totty -

http://en.wikipedia.org/wiki/Polly_(Doctor_Who)

Resourceful, dependable and protective sailor, who fantasizes about Polly -

http://en.wikipedia.org/wiki/Ben_Jackson_(Doctor_Who)