Pretty Little Liars: A Timeline of the Night Ali Disappears

Spencer follows Alison into her house and they continue an ongoing argument about Melissa and Ian.

• Alison demands Spencer tell Melissa about their affair or she will. Spencer relents.
• It gets pretty heated, and it seems Alison is mildly affected by Spencer's feelings. She tries to leave.
• Spencer follows her when she leaves, saying, "this isn't over."
• Spencer picks up a shovel to make her point, and lunges at Alison. She trips and falls, spilling her ADD meds.
• Alison grabs the bottle, realizing Spencer is on speed.
• Spencer begs her not to tell anyone, and Alison agrees, but makes her promise not to take the pills anymore.
• They reach a strange reconciliation, considering one of them just tried to kill the other, and part ways.