SNEAKING AROUND — Carrie (AnnaSophia Robb) is thrilled when the junior-senior lock-in provides the perfect cover for a night out in Manhattan with Larissa (Freema Agyeman) and her Interview co-workers – until a surprising encounter turns her night upside down. Maggie (Katie Findlay) and Mouse (Ellen Wong) confront Sebastian (Austin Butler) about his feelings for Carrie and tell him he better make a grand gesture if he stands any chance of winning her back. Harlan (guest star Scott Cohen) finally convinces Tom (Matt Letscher) to go on a double date, with surprising results. Meanwhile, Maggie tries to find the courage to tell Walt (Brendan Dooling) about Simon (guest star Josh Salatin) before Donna LaDonna (Chloe Bridges) does. Amy Heckerling directed the episode written by Marc Halsey.