Constantine Verevis on Sequels

Some people used to complain that the movie didn't live up to the book.  Now they're saying the movie doesn't live up to its sequel.  Constantine Verevis is a Senior Lecturer in Film and Television Studies at Monash University in Melbourne, Australia, and the co-editor of "Second Takes: Critical Approaches to the Film Sequel." He tells Steve Paulson why so many movie sequels are being made.