Scott Matthewman of "The Stage" gave "The Shakespeare Code" a mostly positive review, highlighting the guest performances and the theme of the power of words. Digital Spy's Dek Hogan found the plot "ludicrous" but praised the production values and special effects. He speculated that he might like it better when watching it again later after he has warmed up to Martha. Nick Setchfield, writing for "SFX", awarded the episode five out of five stars, finding the production "confident". He praised the acting, "witty" script, the concept of the Carrionites' witch-like appearance. IGN reviewer Travis Fickett rated the episode 7.2 out of 10. He found the plot "straightforward", but still said it was entertaining with a good performance by Kelly.