Time Ram has to decide whether to die stupid or stand down, as we review 'The Zygon Invasion/Inversion' which has changed Scotsmen from Peter Capaldi to Sylvester McCoy. In the process, we discover Robert Lindsay, garbled plot points and the Osgood conundrum. Will the quantel paint box cope? Will something very nasty happen to Uxbridge? And how many types of Zygon are there anyway?