A new series of three films from acclaimed documentary maker Jane Treays enters the worlds of children on the edge of society, examining how they cope when their lives are shaped by extreme circumstances. The Smallest People in the World is the moving story of five remarkable American children – Danny, Hannah, Kristen, Bradley and Bri – who are Primordial dwarfs, the smallest and rarest type of dwarf in the world. Picture: from programme one: Bri – aged 16 (left), Callum – her cousin aged 22 months (middle, not a Primordial dwarf), Bradley (right) – Bri's brother aged 14.