Fifth Doctor (Peter Davison)

The annoying gifted mathematician is not quite as dead as you thought -

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

The sulky snake-bait air stewardess is available in her uniform -

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

Daughterly feelings may be replaced now the curious stuffy scientist princess is grown up -

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

The galaxy's oldest schoolboy has overcome his demons -

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

He can be anyone you want -

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

It is not obligatory to show lots of flesh but nobody's given her the memo -

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