Spencer Hastings (Troian Bellisario) never believed her brother-in-law Ian Thomas (Ryan Merriman) really killed her best friend Alison DiLaurentis (Sasha Pieterse).
In a sneak peek from Monday's all-new episode of Pretty Little Liars, Spencer comes face-to-face with her deceased pal during a hallucination.
"You're really mad at me, aren't you? Not telling you about Jason? Things would have been so different if I had spilled," Alison tells Spencer. "Jason's your brother, too. That practically makes us sisters, right?"
Though somewhat disoriented, Spencer begins to fill Alison in on the progress they've made finding her real killer. "I'm glad you guys haven't given up," Alison says, "but don't get hung up on the details and miss what's parked right in front of you."
"I miss you, Spence. I miss that fierce look you get in your eyes when you had to know the answer, had to win the game," Alison tells Spencer. "But this isn't Yahtzee, sweetie. This is some seriously messed up stuff. But here's the good news: you're getting warmer."
Pretty Little Liars airs Monday at 8 p.m. EST on ABC Family.