As you were walking down the street, you heard a very familiar sound. That of someone scraping a key across piano strings. The sound of the TARDIS. You stopped in your tracks and looked around. Either nobody else noticed it or nobody else cared, because they all just went about their day as if nothing was happening. Maybe you were just imagining it.
You'd pushed the thought aside and continued walking when you saw a man you knew just as well as the sound. But it wasn't the Doctor. Any version of him. It was the Master. The sixth version of the Master to appear on-screen. The version played by John Simm. You would have thought it was the actor and not the character, but for some reason you just believed it was really the Master. Only a small part of that was the fact he was wearing the same clothes Derek Jacobi wore when he played the role briefly.
You started walking towards him, and he looked at you. He raised an eyebrow. “Hello, Master,” you said when you got close enough