I am a creature of the "lord of time" type, only I have burned out of my species, and my name is "doctor", it is not real, but I will not tell anyone the real one. I have a "Tardis", this is a time machine that can move me to any point in time, by the way, the Tardis is alive. I am very careful not to create temporary paradoxes, and I also choose only the best assistants. I am 900 something years old, and for the fact that I live a long time, and people do not live so long, I often lose them.