: The episode is seen as a "melancholy" turning point for the Doctor and Clara, exploring their "toxic addiction" to traveling together despite recent arguments.
These video reviews explore why this episode is often considered a perfect entry point for the Twelfth Doctor and analyze its suspenseful direction: [S8E8] Mummy on the Orient Express
: Frank Skinner's performance as Perkins was frequently highlighted as a guest star who held his own alongside Capaldi. : The episode is seen as a "melancholy"
: His portrayal is described as "manic and driven", with some fans noting it as a "triumph" that echoes the Fourth Doctor’s era. : Reviewers from Slant Magazine noted the "pseudo-1920s
: Reviewers from Slant Magazine noted the "pseudo-1920s feel" created through beautiful art deco sets and costumes, such as Clara's striking flapper outfit.
: The "66-second" countdown visible to victims and viewers was hailed by Den of Geek as an effective tool that brought the theme of time and urgency to the forefront, creating immediate tension.