Hailey Sole

Leslie negotiates with her fellow councilmen to pass a new law extending the community pool hours. When Chris comes up with a new idea to solve people's problems around the city, Ron finds himself filling a pothole for a local mom. Meanwhile, Ben and April decide to take a road trip to visit Leslie and Andy.

After being embarrassed over wearing a childish costume at a high school Halloween costume party and being ignored by the guys, Sue asks a flabbergasted Mike for his advice on what boys want when it comes to girls. Meanwhile, Frankie reluctantly volunteers to take Brick's socially awkward school social skills group trick-or-treating; and Axl and his friends devise a plan to trick rather than treat the neighborhood kids on Halloween.

The BAU team investigates a series of murders in Bakersfield, Calif., which have left the victims unidentifiable. Also, the team welcomes new agent Kate Callahan into the BAU fold, who assists them in their efforts in solving the cases. Jennifer Love Hewitt joins the cast as FBI undercover agent Kate Callahan. Kerr Smith guest stars.

When Kate's niece Meg and her best friend are kidnapped, the BAU suspects an online predator engaged in sex trafficking. Greg Grunberg guest stars.

When a prominent attorney goes missing in Boston, the BAU unearths secrets in his past which could point to the reasons for his disappearance.

Victims in California have the BAU searching for an UnSub who may have witnessed abuse as a child. Meanwhile, Kate shows parental concern when her niece, Meg, makes a date with a friend to meet a boy they met online.