This episode appears to be based off the Gilgo Beach murders, which occurred in Long Island, New York between 1996 and 2011.
Izabela Vidovic reprises her role as Rita Lasku in this episode. With this, she becomes the third character to return as a primary character in a second storyline arc, the first two being former main characters Richard and Angela Wheatley.
This marks the first appearance of Meredith Bonner, Carter Reid, Moses Warren, Donald Logan, Heidi Morris and Christine Olston.