movie
I recently got a copy of The Chronicles of Riddick Trilogy, which is a bit of a misnomer, given that it contains two full-length movies and a short animated film bridging the two. That said, the word 'Trilogy' on an inexpensive disk probably sells better than 'Duo', so why worry about that? The following review/commentary contains spoilers for the film, but it's been out for a few years so I doubt that's a big problem.