Last night, Doctor Who took a creepy turn as David Suchet opened the doors to his haunted house in Knock Knock. The episode began with new companion Bill Potts (Pearl Mackie) finally moving out of her mum's foster home but her new pad wasn't all that it appeared.
Fans eagerly tuned in, both in the UK and across the pond in the US, with scores of you taking to our Facebook page to rate your reaction to the episode: nearly 75% gave the spooky episode five stars with just 2.5% of you deeming it worthy of one star.
Meanwhile, on Twitter fans were buzzing about the various twists and turns as Peter Capaldi's Doctor set about rescuing Bill's new flat mates as one-by-one they were bumped off by a mysterious house that saw its new inhabitants as food.
Everyone was instantly freaked out by the creaky old pad that Bill was now calling home.
And its wooden walls had some people seriously spooked...
But while the house was wooden, the acting certainly wasn't:
And fans were delighted by how simply Bill came out to her housemates.
The episode's title inspired some inevitable jokes...
Still, the contents of that vault remains a mystery. And as the episode ended, fans were left wondering... just who is playing that piano?
Could it be...?