The 1966 animated adaptation of Dr. Seuss' beloved yuletide tale narrated by Boris Karloff is incomparable in its simplicity, but this 2018 CGI-animated retelling has its own rewards, chief among them Benedict Cumberbatch's sly – and completely un-Karloffian – voice work as the title character. Other voices include Rashida Jones, Kenan Thompson and Angela Lansbury.