Doctor Who: Every Companion Ranked Worst To Best

An "interesting" companion, to say the least, Nardole accompanied the Twelfth Doctor for a short while, and it is safe to say that he did make an impact on Twelve's era of the show, no matter how strange it may have been. For the most part, Nardole is the companion that existed to be perpetually frightened so that the Doctor can comfort/save/explain things to him on a regular basis, leading to some amusing chemistry and interactions between the two.

Nardole was not completely unaware of who the Doctor was before meeting him, however, as he had previously accompanied River Song on her travels, learning of their adventures and relationship before becoming a part of Team TARDIS himself. Despite the bumbling slapstick and comical cowardliness, Nardole became someone that the Doctor placed a lot of trust in relatively quickly.

Nardole would ultimately prove his courage during the Season 10 finale when charged with protecting a small village against an onslaught of Cybermen of various different generations and capabilities. To save the townspeople (who he had only just met) Nardole sacrificed himself whilst battling the Cybermen (although this wouldn't be confirmed until the Christmas special aired later the same year). In the end, Nardole possessed the true qualities the Doctor admired in his friends.

Zany, entertaining and eventually courageous, Nardole was a decent companion for Peter Capaldi's time on the show.