Without wishing to detract from an endearing hour of entertainment, the most striking thing about An Audience with Albert Einstein is its audience. Forget the typical Edinburgh crew of student actors and families. This one attracts the geeks who actually know something about physics, many to professorial level.
Gary Barber looks the part and mixes erudition with wit at levels that can appeal to those for whom even basic level science was torture.
He has a hard job with relativity, especially as the show next door does a great job of getting its juvenile audience to squeal.
Part biography, part science lesson and part comedy, people will know in advance whether this is the show for them and visitors will undoubtedly enjoy one of the few science-led shows on the Fringe.