Martin Clunes sets out to explore the secret lives of Britain’s heroic army of guide dogs. The dog loving actor was inspired to make the documentary after hearing a podcast story of a blind woman whose life had been changed by her guide dog, but who now faces the daunting task of finding a new dog. Jaina Mistry was a teenager when she lost her sight following a freak reaction to penicillin. For the past decade, her ‘eyes’ have been a black Labrador cross called Laura, but now it is time for Laura to retire, allowing a younger dog to step in and steer Jaina.