CAN YOU EVER REALLY KNOW THE PEOPLE NEXT DOOR?

Cowerworth is the picture perfect neighbourhood. 
Its manicured lawns and low crime rates make it the ideal place to raise a family.

But in a quiet suburb, someone is always watching.
And all eyes are on the couple who have just moved in. 

Marcus and Gina are everything you could want in neighbours: polite and friendly. 
They seem to be the perfect fit. 

Except Marcus has a secret.
And you’re his next victim. You just don’t know it yet.

Irreverent, dark and addictive, KNOCK KNOCK is a nail-biting, spine-tingling and thrilling ride, with a KILLER twist.