The article examines the intelligence of the Doctor's companions from the British science fiction television series Doctor Who. It argues that the most intelligent of the companions is River Song, who is a Doctor-like figure in her own way. She is highly knowledgeable in a variety of subjects, from science to history, and has a knack for solving puzzles and problems. Other intelligent companions include Romana, who is a Time Lord like the Doctor, and Donna Noble, who is a quick learner and is able to think on her feet. Finally, the Doctor himself is the most intelligent of all his companions. He is a genius with a vast knowledge of the universe and is able to think his way out of any situation.