“Mistaken for Strangers” is categorized as a documentary about a band, but it’s actually something much different. It’s immediately clear that we’re watching a study of how adult siblings interact. The fact the filmmaker doesn’t seem to realize what he’s filming until the end only adds to the intrigue.
We see an enthusiastic (and largely incompetent) filmmaker see his film crash, only to see him piece it back together with a clearer vision.
The unexpected direction of this documentary makes it well worth a final grade of B+.