Change It All - S1.E33

Stacey is playing with her friends joyfully when flashbacks of a clone of her hit her head, and when they do she gets extreme migraines. Kora can't figure out what's happening, but can't let Stacey see her, as Stacey has now forgotten of Kora and everything else. Stacey finally recovers in bed about having a clone of her tell her all about the sun, moon and stars. At first, Stacey thought it was herself, but knew the personality difference. Then she looks in the mirror, and it talks to her, setting Stacey off. She then asks her parents and uncle if she was a twin and the other half or herself was adopted into another family. Stacey looks into the mirror and realises she can chat to herself, but soon, almost every memory comes back of their encounters, except Stacey still doesn't know the identity. Kendall refuses to give away, until she getrs sick of Stacey's nagging, and when revealing her name, she disappears, and Stacey is left crying because she hasn't got a sister