Shadow Play - S4-E19
Other mistake: When Ezra takes Spencer's file from the school he takes it from section A-E. Neither of Spencer's names fit into that category.
Pretty Little Liars (2010)
1 mistake in Shadow Play
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.