I could understand why the BBC cut confidential(Karen visits a planetarium? Arthur swims with the sharks)
That was a disaster
Bannerman Road could and should have went on instead of Miracles vs. Negros or what was it
I believe when Michael Pickwoad took over as production designer from Ed Thomas in A Christmas Carol visually it really began to look much more cinematic and big budget.
I'd say even more as there was a massive leap in Series 5 already. Again in Series 7.