Have you ever seen the Discovery channel show “A Haunting?”
I think this is a great evangelism tool for Non-Christians, Skeptics, and particularly those deceived in the Occult. Although the show is not exactly Christian, in many of the stories, the demonic spirit or spirits can only be dealt with by a Priest or some kind of Christian minister.
For a television program of this nature, it has decent special effects and acting.
If you haven’t seen it yet, I recommend you check it out, and encourage others to take a look.