Eleventh Hour Films” adaptation of the Alex Rider novels by Anthony Horowitz is gaining pace with filming slated for the spring.

Austrian director Andreas Prochaska (pictured) is now on board to helm the first four episodes of the eight-part series, calling the shots from scripts by Guy Burt.

The novels follow the adventures of the eponymous teen superspy as he battles his way through various missions to save the world. Eleven Alex Rider books have been published so far with a twelfth due out next year.

Eleventh Hour is also working on Rendlesham, a drama by Joe Ahearne based on the real life reported UFO sightings that took place at a US air base near the Suffolk village of Rendlesham in 1980. Laurence Fishburne will star in the drama and will executive produce through his shingle Cinema Gypsy Productions.

Eleventh Hour Films was founded in 2010 and has produced dramas including Safe House, New Blood, Vexed and Foyle”s War.

Photo: Getty Images Ent/David Buchan.