A string of murders at the Haven High School reunion brings Nathan and Duke back to their alma mater to help Audrey search for the troubled killer.
Bo and Kenzi become entangled in the schemes of a gated community when a babysitter pleads for their help to prove her employer has met with a foul end. Meanwhile, Lauren comes to a difficult – and dangerous – decision.
While deceased Doors International President Jonathan Doors (David Hemblen) resurfaces in cyber form to deliver a potentially deadly blow to the Taelons, an alien murder aboard the mothership reveals to Liam (Robert Leeshock) the Taelon's darkest secret.
Chaos erupts when the Taelons decide to abandon Earth in the face of imminent Jaridian invasion.
Sandoval (Von Flores) agrees to testify against the Taelons in return for immunity.
