Sally Hughes

Rossi and the team present one of the longest-tenured serial killer cases to college students, and they take the class through a nearly 20-year chase for the murderer. Mackenzie Astin guest stars.

Leanne defies Campbell’s order and uses the hospital helicopter to reunite a family for the last time. Also, Willis and Noa use a cell phone app to communicate with a young girl with autism.

Rosewood and Villa are tasked with solving the murder of a woman whose body was found frozen solid. Outside the precinct, Villa’s brother meets the important people in her life, but isn't yet ready to have a reunion with his mother.

Mark attends his high school class reunion and learns that some memories are bittersweet for his old friends.

Mike's new college girlfriend, Mary Beth (Jena Engstrom), seems more interested in Steve (Fred MacMurray) than Mike (Tim Considine). She wants Steve to help her with her trigonometry class.

Ozzie overextends himself being a helpful neighbor with each good deed turning into a disaster.