Serena becomes suspicious of the amount of time Dan and Blair are spending together.
The Upper East Side queen dealing with the fallout of the leaked video. [S4E19] Petty in Pink
The video is blasted to everyone at the party, exposing their secret relationship. Serena becomes suspicious of the amount of time
For more details on the cast and full production crew, check out the episode page on Apple TV . [S4E19] Petty in Pink
The suspicious friend orchestrating the investigation.