Harry Potter again worked his magic at Time Warner in the fourth quarter -- No Doubt for the last time. With the final installment of the franchise dominating the box office in the last months of 2011, the media giant saw its net profit climb to $773 million for the period, from $769 million for the same quarter a year ago. Revenue rose to $8.2 billion of which filmed entertainment accounted for $3.9 billion. (The company also credited video-on-demand and streaming services such as Netflix for contributing to the strong results.)