The Season 1 finale serves as a violent collision point for the show’s three main storylines: Mark and Eleanor’s survival, Naomi’s homicide investigation, and Claire Logan’s desperate scientific pursuit of a vampire cure.

The finale highlights the tragic nature of the vampires—particularly Peter and Eleanor—who are often manipulated or forced into horrific acts by the humans who care for them. Ending Status & Cliffhangers

In the ensuing chaos at the lab, Claire stabs Mark, and Peter attacks Naomi, brutally bashing her head in. Eleanor manages to overpower Claire and Peter to save her father and Naomi.

The season ends on a significant cliffhanger with three active vampires in the city: Eleanor, Peter, and now Naomi. Naomi faces a profound internal conflict as a homicide detective who must now kill to satisfy her hunger. Note that Showtime officially the series after this single season, leaving these plot threads unresolved.

This response focuses on the Season 1 finale of the Showtime series Let the Right One In , titled "What's Done in the Dark."