The cast includes Katie McGrath (Merlin), John Hurt (Tinker, Tailor, Soldier, Spy), Tom Felton (Harry Potter), Sebastian Stan (Captain America), Jessica Brown-Findlay (Downton Abbey), Vanessa Kirby (The Hour), Emun Elliot (Game of Thrones) and Janet Suzman (Nicholas and Alexandra).
Adapted for TV by Adrian Hodges (Primeval) and directed by Christopher Smith (Triangle), the high-concept thriller takes a journey through the south of France of the present, and the dark and tortured landscape of the Crusades and Cathar massacres of medieval times.
Labyrinth will air on Channel 4 later this year.
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