Seven famous faces embark on a challenging spiritual journey…

Imagine The Real Marigold Hotel meets a Bear Grylls survival show, as seven celebrities begin a pilgrimage through the steep Spanish hills to the shrine of St James the Apostle.

Catholic-raised Debbie McGee, atheist Neil Morrissey and Christian Rev.

Kate Bottley are among the stars examining their faith and spirituality as they tackle the demanding 800km trek, pushing themselves beyond their limits and dealing with difficult emotions and memories.

It may sound like another excuse to put celebs through the mill, but this three-parter turns out to be a truly thought-provoking and well-made piece of telly.