Louis Theroux has worked tirelessly for the last two decades, cultivating a career as one of the world's top documentary makers.
But the 52-year-old Oxford graduate's adventures frequently see him spend long periods away from the home he shares with wife Nancy Strang and their three children Albert, 15, Frederick, 13, and six-year-old Walter.
And that, he has admitted, can put a serious amount of pressure on a relationship.
