Castles in the Sky (Blu-ray disc)

Drama starring Eddie Izzard, Laura Fraser and Julian Rhind-Tutt. When Robert Watson-Watt (Izzard) pioneered his radar system that could detect the enemy during war, he hand-picked a team of meteorologists to help him convince the powers that be that it could really work. Struggling on a very small budget and battling personal issues Watson-Watt continued to fight for his dream and by 1939 had developed the world's very first radar system which went on to prove invaluable in winning the Battle of Britain. The cast also includes Lesley Harcourt, Alex Jennings and Celyn Jones.