In episode 2, AKA Crush Syndrome, Pam's only in one scene--the beginning of the end. She interrupts a meeting between Jeri and Jessica to inform Jeri that she has to call her wife...because she knows. Geez. Poor Pam.
The dress has a pretty white and green polka dot pattern. It's the Jilda by DVF:
And that's it in episode 2 AKA Crush Syndrome for Pam and her amazing wrap dresses.