Ever wondered if there's someone out there who looks exactly like you? Well, statistically, it is estimated that for every face there are 7 doppelganger matches around the world.
The curiosity of wondering if there is a someone out there that looks like you is fuelling a global phenomenon of people searching for their doppelgängers. Websites set up to find these matches, like TwinStrangers.net, have already attracted over a million people from around the world. The doppelgänger phenomenon has also caught the attention of leading twinexperts at the Department of Twin Research in St Thomas' Hospital in London. They have been studying similarities between identical twins for years and want to see just how similar these doppelgängers are.
In this documentary, we follow people as they track down their twin stranger across the globe and meet for the first time. They get to know one another and find out about each other's lives and whether there are any other similarities. While the pairs get to know each other, they are also undergoing a series of tests by the twinexperts at St Thomas' Hospital. These include measuring similarities of facial features using the latest 3D scanning technology, 2D facial recognition analysis and DNA ancestry testing.
The experts then get 100 people to rate the similarities from photos from most alike to least alike. Taking all of the results into consideration, the twinexperts will then reveal which pair is the most identical.