In no particular order The Doctor Who Mind Robber today presents 10 Great Companion Outfits of the Sixties.
1. Jamie McCrimmon – Kilt
Possessed of a fine pair of legs, Jamie McCrimmon always looked stunning in his kilt
2. Zoe Heriot – Catsuit
Zoe fights the Karkus in her famous catsuit
3. Barbara Wright – Yetaxa
Barbara masqueraded as the reincarnated priest Yetaxa in The Aztecs
4. Dodo Chaplet – The Celestial Toymaker
Zoe looked fabulous in The Celestial Toymaker
5. Sara Kingdom – The Daleks’ Master Plan
Jean Marsh in black catsuit as Sara Kingdom
6. Zoe Heriot – Space Pirates’ Hotpants
Zoe shows some leg in The Space Pirates
7. Susan – An Unearthly Child
Susan at her casual best in An Unearthly Child
8. Polly – Way Out Sixties
Is this the ultimate Sixties companion outfit?
9. Victoria – The Abominable Snowmen
Victoria wears Victorian riding gear in The Abominable Snowmen
10. Zoe Heriot – The Invasion
Zoe in a green feather boa in The Invasion
HONOURABLE MENTION
Polly dresses as a local in The Underwater Menace
Vivien Fleming
The Doctor Who Mind Robber 
Great list! Of course Zoe’s catsuit has to be up there along with Jamie’s kilt. One outfit that I would include on my list though would be Polly’s outfit in “The Underwater Menace,” the one she puts on to blend in with the natives. It’s so bizarre, but that’s why I love it. I’m actually trying to figure out a way to cosplay it.
I agree. I’ve just added it as an Honourable Mention. Good luck with the cosplay outfit!
The girl in the Toymaker episode is Dodo, not Zoe!