"Q is for Quarry" is the seventeenth episode of the second season and the forty-third episode overall of W.I.T.C.H. It first aired October 7, 2006.
Summary[]
W.I.T.C.H. pursue Nerissa and her Knights of Destruction on Zamballa, unknowingly falling in her trap, and losing Kadma and the Heart of Zamballa in the process.
In the B-story, Will meets her father's girlfriend, Serena Sanchez and thinks she's another one of Nerissa's disguises, and she hires Blunk to spy on Serena.