All of the links below point to resources of Mars Hill Church, in Seattle, Washington. The pastor of Mars Hill is Mark Driscoll, and I obviously respect him and his teaching. That said, I can respect someone without agreeing with EVERYTHING he says. I point you to Pastor Driscoll's teaching with the trust that anyone interested enough looking further into these matters also is mature enough to think through what he says with discernment.
If you are likely to only listen to a little bit of what is linked to here, then you should scroll down to the Q&As below about Jesus and Demons. If you have the appetite for it, start here and work your way down.
http://www.marshillchurch.org/media/spiritual-warfare - This is a 3 part seminar plus a Q&A session on spiritual warfare, and here (http://blog.marshillchurch.org/2008/08/26/spiritual-warfare/) is Driscoll's blog post containing notes on the seminar.
Pastor Mark Driscoll is teaching through Luke's Gospel, and has come through some of the same stories we covered in Mark's account. Below are three sermons concerning demons. After the first sermon, there are two Q&A sessions in which Driscoll answers questions text messaged to him by members of the congregation.
IF YOU LISTEN TO NOTHING ELSE HERE, I SUGGEST YOU CHECK OUT THESE Q&A VIDEOS.