I was listening to the audiobook of Castravalva earlier and there a bit in it where it describes Nyssa and Tegan as friends. I wasn't sure about this, it didn't seem quite right. Friends? Really? It got me thinking. Is there any scene or story where they are shown to be friends? Or is it just assumed? I can't really see any evidence that anyone in the season 19 TARDIS crew were good mates. They just seem to be a bunch of people thrown together and getting on with it. Tegan's permanently wanting to get home, Adric's being a smart arse and Nyssa is ...well... just Nyssa. In fact when Tegan is accidentally left behind at the end of the season nobody seems that bothered.
So were they friends? What do you think?