Nathan plays a redemption match; Ava and Matt decode a cipher from the new killer haunting LA.

Cast: Kaley Cuoco, Chris Messina, Tom Bateman, Liana Liberato, Melissa Fumero, Josh Stamberg, Joe Williamson, Annie Rose Ramos, Nancy Linehan Charles, Diana DeLaCruz, Phillip Garcia, Loren Lott, Courtney Dlugos, Ever Mainard, Jacob-Adam Lopez, Jermaine Alexander, Donovan Patton, Josh Archer