I have spend may an hour watching Dr Who and I can see why it has been able to endure for 50 years.
I think we could all learn a few lessons from the Doctor. Firstly there is nothing wrong in re-inventing yourself. And keep the things that plague you to be either really scary or downright amusing.
I am happy to see that the program has soared to huge popularity as I feel the script writers of this program always keep it fresh.
Here is my favourite Scene.