Eddie Izzard stars in this funny, moving and inspiring factual drama about the pioneering work on radar by a little known team of scientists in the run up to the Second World War. On 26 February 1935, Robert Watson- Watt demonstrated for the first time that aircraft could be detected by bouncing radio waves off them. By the time the war began in 1939, radar stations were dotted along the British coast, tracking aircraft at distances of 100 miles away. It was this invention - more than any other - that saved the RAF in the 1940 Battle of Britain. This drama follows those early years as Robert Watson-Watt and his team of scientists worked tirelessly to see their invention taken seriously, from the highs and lows, to the battles for funding and the political wrangling, before getting a final taste of victory.