Peter Sellers was nominated for an Academy Award for this, his penultimate film.
As it turned out, The Terrible Revenge of Fu Manchu, was his final film. Really, this should have been his last film -- a beautiful testament to an extraordinary career.
The film is a snapshot of the life of Mr Chancey, played by Sellers.
Chancey is clearly backward and yet manages to convince the other characters that he is some sort of genius and prophet.
Seller's portrayal of Chancey is understated and quite brilliant, the end sequence is startling and revelatory.
This is the greatest film you've never seen.