Ali is seen arguing with Ian Thomas and spending some time with then boyfriend Ezra before she's buried.
"Pretty Little Liars" flashes back to the night Alison went missing in its season 4 finale. Sneak peeks to the episode have landed online if the form of photos, some of which tease what happened on the fateful night.
Ali, wearing an oversized jacket on top of a yellow shirt, is seen arguing with the late Ian Thomas (Ryan Merriman) in some of the images. Other photos show her sitting in a car with ex-boyfriend Ezra, before she's later pictured being buried.
It appears that Ali will come out of hiding in the present day as she is featured reuniting with Aria, Emily, Hanna and Spencer in other photos. Noel Kahn (Brant Daugherty) is also back in the episode.
Titled "A Is for Answers", the season finale is slated to air Tuesday, March 18 at 8/7c on ABC Family. It promises to provide the answers about what happened to Ali the night she disappeared.
According to the official synopsis, "After years of questions and mystery surrounding the night Alison DiLaurentis disappeared, her four best friends come face to face with Ali and finally learn what really happened to her that September night. Now with their newfound knowledge of Ali's long-held secrets, can Aria, Emily, Hanna and Spencer help Alison finally figure out who 'A' is?"