The Dark Tower was an episode with huge potential and great performances, despite feeling a little rushed.

“It’s a story with huge potential and some wonderful performances, though there’s not enough time to tell the tale effectively which robs it of some of its drama, especially in the final act. It does, however, change Gwen’s trajectory as Morgana’s dark magic takes hold, and – as has been the case with all the episodes of series five thus far – gives us a tantalising taste of what is to come.”

Sums it up quite nicely in the review of The dark tower from Den of Geek.

Read more: http://www.denofgeek.com/tv/merlin/23393/merlin-series-5-episode-6-review-the-dark-tower