Good Luck Charlie, It's Christmas!: The Duncan family plan to go to Amy's parents in Palm Springs for Christmas. However, they are separated on route after Teddy (Bridgit Mendler) makes a snap decision to give up her airline seat for a free ticket for her spring-break trip to Florida with her best friend Ivy. Unwilling to let her daughter travel alone, Amy also disembarks the plane, only to discover that the next flight to Palm Springs departs after Christmas. Meanwhile, the rest of the family arrives in Palm Springs, but things aren’t any easier as Bob (Eric Allan Kramer) tries to care for Charlie (Mia Talerico) under the watchful eye of Amy’s mother Petunia (Debra Monk), who strongly dislikes Bob; PJ (Jason Dolley) learns the pros and cons of his grandparents’ pool after getting a sunburn; and Gabe (Bradley Steven Perry) quickly realizes the downfalls of teaching Grandpa Hank (Michael Kagan) how to play his favorite video game after Grandpa becomes addicted to it.