E9 • The Great Unknown

Life hasn't been smooth sailing for 16-year-old Carrie Bradshaw: her mother just passed away, her younger sister is acting out, and their dad is struggling to raise two teenage daughters alone. The arrival of sexy new guy Sebastian Kydd brings Carrie some excitement.

New couple Carrie and Sebastian can't seem to catch a break. Between being grounded and rival Donna's sneaky attempts to break them apart, Carrie worries Sebastian will lose interest in her. Desperate for some alone time with him, Carrie must lie to her father.

After Tom forbids Carrie to see Sebastian again, Carrie snoops through Tom's work files and uncovers some alarming information about Sebastian's past. Carrie decides to confront Sebastian about what she's discovered and is shocked by his reaction.

When Carrie is invited to a Halloween party in the city by Larissa, she decides to invite Walt to go with her to keep her company. It doesn't take long before the night goes awry and Carrie is forced to babysit Larissa, who has clearly taken too many drugs.

Carrie runs into an old friend and gets invited to his mother's dinner soiree in Manhattan, but her feelings for Sebastian get in her way. Mouse is excited about getting back together with Seth, but her worries about being bad at sex lead her to ask Walt for help.

Carrie gets in way over her head when she tries to cook the perfect Thanksgiving dinner for her family, her new boyfriend, George, and his dad, Harlan, so she enlists Mouse's help.

Carrie invites George to the school dance, but when she suggests they leave the dance early, George gets the wrong idea about her intentions. Meanwhile, Donna LaDonna catches Maggie cheating on Walt and blackmails her into keeping Carrie away from Sebastian.

Carrie is thrilled when the junior-senior lock-in provides the perfect cover for a night out in Manhattan with Larissa and her Interview co-workers ... until a surprising encounter turns her night upside-down.

When Dorrit goes missing under Carrie's watch, Carrie lashes out at Sebastian, the one person who can help her find her sister. Mouse butts heads with West, a popular jock who, much to her chagrin, stole her spot as number one in the class.

On her 17th birthday, Carrie is torn between an opportunity to mingle with New York's literati and spending time with her friends and Sebastian. Mouse goes to extensive lengths to impress a Harvard alum who has her eyes set on West, with hilarious results.

Carrie jumps at the chance to a take on a fabulous new identity as Larissa, but gets more than she bargained for when Larissa's hijinks catch up with her. After a whirlwind day in Manhattan, Walt is forced to face the feelings he is desperately trying to hide.

When Carrie inadvertently complicates things with Sebastian, she tries to fix it by taking him to Madonna's "The Virgin Tour" launch party; but in her quest for the perfect night it only makes things worse.

Carrie is happy going to her junior prom, but when hidden secrets are revealed plans begin to change. For the first time in her life, Mouse decides to defy her parents to date whom she wants. Elsewhere, Larissa makes Carrie and Walt an enticing offer.