Canadian Preview of Pretty Little Liars Season 2, Episode 21: ''Breaking the Code'' Tweet February 14, 2012 by Rebecca Martin Related: Pretty Little Liars, Relationships , Hanna Marin , Spencer Hastings , Emily Fields , Pam Fields , Ezra Fitz , Mona Vanderwaal , Ella Montgomery , Wren Kingston Credit: Much Music via Youtube Air date: February 20, 2012. Secrets explode on Pretty Little Liars Season 2, Episode 21: ''Breaking the Code.''
