Louis Theroux has long been considered the master of the documentary and tonight's TV offering confirms just that.
'Transgender Kids' sees Louis travel to San Francisco where he meets youngsters who have been diagnosed with gender dysphoria and who are undergoing medical treatment. Louis spends time with the clinic's patients and their families as they negotiate their way along this life-changing and emotional journey.
The fascinating documentary, which first aired in 2015, is our TV pick for this Sunday night and is not to be missed. It gets underway on BBC 2 at 9pm tonight. Check out the trailer below.