This Friday, ABC Nightline crews will videotape an unusual debate at Ballard’s Mars Hill Church. The topic: Does Satan really exist? Mars Hill Pastor Mark Driscoll and author Deepak Chopra will be among the debaters to tackle the topic with Nightline correspondent Dan Harris. Nightline says the idea from the debate came while they were doing a story with Pastor Driscoll back in January. And two years ago, a Nightline debate about the existence of God was one of the show’s most popular ever. This Friday’s event is by invitation only, and the episode will air March 26th at 11:35 p.m.