Ascent - From the creator of Bodyguard and Line of Duty

Yefgenii Yeremin is a flyer and he is a phantom. In the Korean War, he is the legendary ace dubbed 'Ivan the Terrible', shooting down more American jets than any other pilot in history. But the Soviet Union's involvement in Korea must be kept secret, so Yefgenii is exiled to a remote Arctic base, his name unknown, his victories uncelebrated.