Black Monday

Wide-eyed Blair is thrust into the insane world of '80s Wall Street; Mo enacts his master plan to take over the Georgina Jeans Company.

A Hollywood screenwriter shadows Mo at the office as Mo and Dawn fight over her desire to be made a partner; Keith plays a prank on Blair.

Mo attempts to create a bond with Blair; Dawn and Spencer have a lively dinner with Dawn's parents; Keith finds his secret increasingly difficult to hide.

Mo and Dawn attempt to reunite Blair and Tiff to keep the Georgina play afloat; Mo's debts come back to haunt him.

Mo takes Dawn to the Predator's Ball in an effort to raise the capital The Jammer Group needs to pay off their debts; Blair is saddled with a weekend work assignment.

At Blair and Tiff's engagement party, Mo's feelings for Dawn begin to cloud his judgment; Wayne and Yassir get into serious trouble; Keith takes a big step.