Westport is known for its Halloween tradition of leaving an anonymous note and goodies on a neighbor’s doorstep (called a “Boo”). Katie tries to play it cool but is absolutely giddy when the Ottos receive their first “Boo.”

Taylor enlists Oliver to help her carry out a scheme so she can ditch her less cool friend Ellen and go to a concert with her "blondetourage." Meanwhile, Katie is devastated when Anna-Kat doesn't need her as much anymore, which causes Katie to make some poor and desperate parenting decisions.

After feeling unappreciated by Greg and the kids, Katie ditches her family for a day at her favorite hideaway spot and leaves Viv in charge of the household. Viv takes this as an opportunity to see if she really is mom material.

Anna-Kat runs for the Green Chair position in the school election against Chloe Brown Mueller’s daughter, which results in Katie and Chloe turning their kids’ election into a feud of their own. Meanwhile, Greg becomes concerned that Taylor’s new friend Pierce is trying to steal her away from Trip, causing Greg to intervene and scheme to prevent it.

Katie plans a “friend date” in hopes of reconnecting with Taylor and encourages Greg to attend self-help guru Johnny Diamond’s seminar with Oliver. Meanwhile, Anna-Kat takes extreme measures to secure her place as Katie’s favorite child.

With the kids away at the school dance, Katie and Greg look forward to a romantic evening alone; but Anna-Kat is crushed when the boy she likes doesn’t ask her to the dance, and Oliver begins to panic when the town psychic’s predictions begin to come true.

Katie ignores Greg's warning and takes Anna-Kat through a terrifying zombie-themed maze at the annual Halloween carnival. Once inside, Katie quickly regrets her decision and sends Anna-Kat to find help. Meanwhile, Greg has entered a pumpkin carving contest and is ready to go head-to-head against the previous year's winners.

With Katie’s 40th birthday fast approaching, her self-esteem starts to wane. So Greg encourages her to go out and enjoy a night on the town with the girls, even suggesting she leave her wedding ring behind for a night of faux-single, silly fun. Meanwhile, Angela receives devastating news that will turn Doris’ life upside down. While Katie is away, Greg enlists the kids’ help to create a birthday present that is a heartfelt reminder of how much she is loved.

Katie reminds Anna-Kat that she is a strong, independent, young woman and encourages her to start standing up for herself when dealing with Taylor. Meanwhile, Oliver feels left out when Greg invites Lonnie, Trip and Franklin to join him at the Historical Guild's latest reenactment.

Katie confronts a classmate's mom when she suspects Anna-Kat is being bullied at school. Meanwhile, Taylor sets out to complete the final item on her life skills checklist - teaching Greg to shoot a three-pointer - so that she can attend her senior prom. At the same time, Oliver is sympathetic when a caller at the Teen Help Line confides that no one asked her to prom.

Katie goes to great lengths to appease Principal Ablin in order to ensure Taylor graduates high school. Meanwhile, Greg finishes ghost writing the final chapter of Lonnie's book. And while Oliver is devastated to learn Cooper's family will be moving out of Westport, Anna-Kat tells Franklin she is ready to venture outside her comfort zone and plans to attend sleep-away camp during summer break.