It is fairly easy recognising the different Doctors from Dr Who, as there have only been eleven in the TV series. However, when it comes to the Doctors companions there is a whole list of men, women, girls, boys, aliens and a robot dog too! Nevertheless, can you them all? Well you do not have to because here is a cool info graphic that lists the whole lot in one go from the start in 1963 to the present day. How many did you know?
Source [Nerd Approved]