Other mistake: At the end, when the reflection of burned Lucy still shows her beautiful, Dracula's reflection shows him as he is seen; not old and ugly as in his usual mirror reflections.
Dracula (2020)
1 mistake in The Dark Compass
Starring: Dolly Wells, Claes Bang, Joanna Scanlan, John Heffernan
Zoe: Put him down.
Dracula: Why?
Zoe: This is England. Conversation precedes dinner.
Blood Vessel - S1-E2
Trivia: The secretive room on the ship with a dark secret is cabin no. 9. Mark Gatiss, co-writer of this series, also co-wrote another creepy BBC series called "Inside No. 9"