If you are not sure you need narration, try to cut your show without it. Use your interviews to tell the story. It's better to hear the story told with the voice of the people in it anyway. If you end up needing narration it will become obvious later on and you can fill in the empty spaces.
____________________________________
Eric Susch
www.LetsKnit2gether.com
www.ElectronicSprocket.com