Originally Posted by
Derek Metaltron
The problem possibly with the Season 19 crew was that you had three smart types - the Doctor, Nyssa and Adric - with Tegan really both the bossy one and the audience viewpoint. I think it’s important to remember actually that Tegan was distinctive in being the first non British companion (space Brits don’t count) and someone not wanting to be there. I think it’s clear too that Five had a fondness for Nyssa over the other two since her intellect was decent compared to his (the Doctor clearly has a type when it comes to arguably romantic relationships). Adric is probably the odd one since once Nyssa was around his role seemed secondary, hence why he got removed. Then Nyssa was removed in Terminus presumably because the BBC thought audiences liked Tegan more and they wouldn’t want an all alien TARDIS crew?