S6, E9: It is prom time at Rosewood High - except for Alison, Aria, Emily, Hanna and Spencer, who have been banned due to "security" concerns. As the girls take this as the final humiliating blow to their high school careers, the girls' mothers try to make the best of a bad situation by offering a prom at home in Spencer's barn. At first reluctant, the PLLs agree and try to make the best out of a bad situation. But Charles - who has never been one to miss a formal - has other plans in store to make this a night the girls will never forget. Meanwhile, Veronica (recurring guest star LESLEY FERA), Pam (recurring guest star NIA PEEPLES), Ella (recurring guest star HOLLY MARIE COMBS) and Ashley use prom night to touch base on everything that has happened to their daughters.