IGN's Ahsan Haque gave the episode a score of 9.3 out of 10, describing it as "an extremely well written and directed episode with awesome visuals and excellent sound design". Though he noted that "much of this episode felt a bit like watching a moderately entertaining B-movie like Event Horizon", he thought it was "presented with ample flair and charm". Dek Hogan of Digital Spy stated the episode got the series "back on form", though he noted that losing the TARDIS was becoming tiresome.
The critic's positive assessment of the episode suggests that it successfully revitalized the series, but Hogan's comment about losing the TARDIS being tiresome implies that some aspects of the show may be becoming repetitive or formulaic.