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 father/son 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 in order 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, while Keith takes a big step.

We get a glimpse into Mo’s past, while Blair and Dawn pursue some necessary detective work.

Mo is determined to make Blair and Tiff’s marriage happen, for better or worse. Keith tries to impede the SEC’s sting operation by any means possible.

Everything comes crashing down.

After the fallout from Black Monday, Dawn and Blair pursue a new deal from different directions while Mo runs from his past.

Mo has an unexpected guest. Blair and Tiff go looking for a new home.

Blair's new political connection puts Dawn in a compromising position. Yassir and Wayne attempt to solve an office mystery.

Blair and Dawn take to the skies to pursue a new investor. Mo and Keith struggle with relocation.

At TBDs Halloween party, Blair tries to make the trade of a lifetime, Mo and Dawn argue over an opportunity, Tiff and Corkie loosen up, and Keith phones a friend.

A plan comes together. Season finale.

The group is thrust (literally) back together in a black-site interrogation turned group-therapy session.