For completism's sake, I'm including all the companions of The Doctor, so that means one-offs too, like Adelaide and Christina – they were described in the BBC press releases as companions, so they're fair game. There'll be the equivalents of bronze, silver and gold for each category, so let the tournament commence!
3. Zoe Heriot (Wendy Padbury)
But after she's stowed away in the Tardis, Zoe goes from being Spock poster-girl through to a much more warm-hearted and caring companion. She still uses her total recall and whizzkid brain for defeating Cybermen fleets and finding her way through claustrophobic tunnels,