Hush Hush Sweet Liars - S6-E20
Revealing mistake: When Aria calls Spencer from the Lost Woods Resort, Spencer's phone is not in Call Mode.
Pretty Little Liars (2010)
1 mistake in Hush Hush Sweet Liars
Starring: Lucy Hale, Ashley Benson, Sasha Pieterse, Shay Mitchell
The Homecoming Hangover - S1-E7
Trivia: The substitute teacher filling in for Mr. Fitz's class is played by Sara Shepard, the author of the Pretty Little Liars novels.