Discontinuity in Doctor Who
What are your favourite or funniest Doctor Who examples of characters meeting each other before their established on screen meeting?
I’m thinking of things like River Song having already met Doctors we never saw her meet on TV, the Doctor meeting the “wrong” incarnation of the Master, or stories that reveal two characters have crossed paths somewhere in the Doctor Who timeline that we simply weren’t aware of.
I’ve already posted this over on r/BigFinishProductions, but I thought it would be interesting to ask here too.
The more ridiculous the continuity gymnastics, the better.
What are your favourites?