O (Spyfall)
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The story in question has not yet been released in its entirety. Please exercise caution in asserting any more than is actually present in the narrative so far. Be aware that certain facts which appear to be true may not be true once the story is completely published.
"O" was a member of the British Secret Service agency, MI6. According to the Thirteenth Doctor, he was one of their best. O had previously been a champion sprinter, something which was noted in his official file.
According to a man who claimed he was the Spy Master, O was abducted at the start of his new career, and miniaturised using a Tissue Compression Eliminator. The man kept what appeared to be the original O in a matchbox. He showed this to the Thirteenth Doctor to support his story. (TV: Spyfall)
