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 other mistake in Shadow Play
Starring: Lucy Hale, Ashley Benson, Sasha Pieterse, Shay Mitchell
Careful What U Wish 4 - S1-E14
Other mistake: During the scene after the fund raising dance when Lucas offers to take Hanna home, she calls him Ian when she says that she is going home with Emily and Spencer. Even if she says "I kind of promised them", the subtitles say Ian.
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.