This article contains spoilers for "Castlevania: Nocturne" season 2 ... and Dracula's castle returns, prompting Alucard (James Callis in the Netflix series) to enter it and investigate.

In case you missed it when it first aired, the original Castlevania series follows vampire hunter Trevor Belmont, powerful witch Sypha, and Alucard as they take on Dracula and his demonic armies.