They Might Be Giants

Released in 1971, They Might Be Giants starred George C. Scott and Joanne Woodward.
Scott plays a judge who has retreated into fantasy after the death of his wife and believes himself to be Sherlock Holmes.
Woodward plays a psychiatrist who takes on this case and she is coincidentally named Watson.
They Might Be Giants makes a fascinating and fun film with the two leads making for an unusual Holmes and Watson.