"End of Days" received mixed reviews from critics. Brigid Cherry of Total Sci Fi rated the episode 5 out of 10, describing the episode's gaps and dangling plot threads as "downright annoying," and felt preceding episode "Captain Jack Harkness" was more intriguing.
Critics provided mixed reviews for "End of Days." Brigid Cherry of Total Sci Fi rated it a 5 out of 10, criticizing its gaps and dangling plot threads as "extremely annoying," and found that the preceding episode "Captain Jack Harkness" was more intriguing.