Episode 5 is an "exciting and thought-provoking" chapter that highlights why this series is considered a top-tier psychological thriller. It’s a must-watch for fans of anti-heroes and Death Note -style mental battles. Watch if you like: Gritty Victorian-era settings. Calculated, high-stakes revenge plots. Complex characters who challenge your sense of morality.

: A standout aspect is how the show avoids simple "good vs. evil" tropes. The "justice" served in this episode is brutal, raising questions about whether William's extreme methods are justifiable.

: The episode follows William's investigation after one of his students, Lucian, goes missing. It moves quickly to expose a sinister opium den and the callousness of the nobility. Reviewers from Reddit noted it was a massive improvement over the previous episode, successfully covering the major plot points despite the short runtime.

: The depiction of Victorian London is appropriately grim. Fans on Facebook have praised the "eye-catching" color palette, particularly the vibrant red eyes of the characters, which add a gothic flair to the series. The opium den sequence was also noted for its historical accuracy to contemporary imagery.