One of my professors was the student of the don at Oxford who recruited John le Carré into MI6. I love le Carré's books so I was really intrigued by this, and asked him if he ever got recruited to MI6.

To my surprise, he said yes. But it was done in a very le Carré-esque style. My professor had an interview with MI6 which he thought he bombed, and then didn't hear back from them, confirming his assumption... until he got a completely out-of-the blue job offer from an obscure UK government agency that involved lots of travel to Norwegian fisheries. He told me with a smile that it wasn't until he turned down the offer that he realized that he had gotten the MI6 gig, but he failed the final test!