Who is doctor who? What is doctor who? I will tell you. Doctor who is a science fiction show produced BBC. The Doctor is a humanoid alien who travels through time and space and stops evil monsters up to no good. He travels in a TARDIS (Time And Relative Dimension In Space) It's a time traveling machine that's bigger on the inside. You need to watch it. Every season he has a companion with him who helps him. Here is a trailer link: https://www.youtube.com/watch?v=UnPUF8an-XE
