In this one off, 90 minute special, Coronation Street's DNA Secrets reveals the secrets lying deep in the DNA of Britain's best-loved street. Uncovering the ancestral stories of Weatherfield's finest – and revealing incredible connections they had absolutely no inkling about…until now.

From a single, tiny sample of saliva it's now possible to find connections with people and places that span centuries and continents - revealing unexpected stories and family connections with people on the other side of the planet or in your own street. Working with Ancestry.com, the cast of Coronation Street - old and new – are opening their doors to let us find out more about who they really are.

Presenter Nicky Campbell, with the help of an on-screen genetic expert, meets the Coronation Street cast on the famous cobbles to explain the science behind the results. In the Rovers, Roy's Rolls and Nick's Bistro, the assembled cast will be presented with their DNA results and discover they have DNA from corners of the world as far flung as Northern Russia, Azerbaijan and Melanesia.