Epic is a word oft-applied to cinema, but rarely can it have been more appropriately used than to describe the work of Peter Jackson and Philippa Boyens. For along with writing partner Fran Walsh, it is they that brought us both the Lord Of The Rings and Hobbit trilogies, not to mention King Kong.

Their latest project is the equally ambitious Mortal Engines, which they wrote and produced. Based on the novel of the same name by Philip Reeve, Mortal Engines is based on the mind-boggling premise that cities of the future have been mounted on wheels and motorised in order that they can hunt and prey upon each other.

The film's score is provided by Tom Holkenborg, also known as Junkie XL, a previous guest on this show. There's plenty of his work to enjoy in this episode, as well of that of Howard Shore, who worked on The Lord Of The Rings & Hobbit movies.