When a man comes into the hotel suite, Ivy and Lola — decked out as prostitutes, handcuffs and all — assume it's Mr. Nevins, but it's not: It's Andrew Tyler, Chuck's private investigator. He insists they leave, claiming that Chuck had to change the plans because they're in danger. The girls cooperate, unaware that Andrew is lying, and bring Andrew to Chuck. However, he's in for a surprise when he's ambushed and forced to face Bart. Andrew quickly confesses, telling Bart that Mason eventually threatened his family, too, so he was forced to start working for him. In usual Upper East Side fashion, cops are on hand for the confession, so they come out of hiding and arrest Andrew. The best part? Bart finally tells Chuck that he's proud of him — even if it seems totally emotionless — and Chuck is thrilled to have his father back. But do you think Bart will stick around? And how will Lily react?