Complex sentence: Brian De Palma usually had themes of guilt, voyeurism, paranoia, and obsession in his films, as well as such plot elements as killing off a main character early on, switching points of view, and dream-like sequences.
Split into simpler sentences: Brian De Palma usually had themes of guilt, voyeurism, paranoia and obsession in his films. Similar plot elements include killing off a main character early on, switching points of view, and dream-like sequences.