Despite doing some excellent work on Being Human, Toby Whithouse's success rate on Doctor Who has been patchier than the sixth Doctor's jacket. Although getting off to an incredible start with 'School Reunion', his later offerings ('The Vampires of Venice', 'A Town Called Mercy', etc.) utterly failed to set the Whoniverse alight. Yet tonight's episode was a thoroughly absorbing mix of base-under-siege goodness, ghostly goings-on, and nautical caperings, sat atop an unfolding narrative which although at times felt slower than we're used to, never felt boring.
