The actor who plays teenager Callie Sadecki, the daughter of Melanie Lynskey's Shauna, talks to The Hollywood Reporter about how she played that fateful scene. By Jackie Strause Managing Editor ...

Simone Kessell, who plays Lottie in the show's adult timeline ... and a cassette tape that her daughter, Callie, played by ...

Callie Sadecki (Sarah Desjardins), wearing the gold heart necklace that belonged to Jackie Taylor (Ella Purnell), and a flashback shows how and why Callie killed Lottie. A flashback shows that ...

Lottie and viewers have seen the candlelit stairwell ... So when you did find out that it was Callie (Sarah Desjardins) and saw how it played out, did her death make sense to you?