Trailer Park Luc Besson is at Full Sci-Fi Insanity with Valerian (Trailer) March 29, 2017 Dane DeHaan and Cara Delevingne are intergalactic secret agents sent to prevent the peaceful utopia of Alpha from being destroyed by an unknown threat in this summer’s Luc Besson directed sci-fi epic, Valerian and the City of a Thousand Planets.