Mo's feelings for Dawn threaten to cloud his judgement at Blair and Tiff's engagement party. Meanwhile, Wayne and Yassir find themselves in deep trouble, and Keith takes a leap.

Mo invites Blair to his bachelor party, while Dawn realises that she's more than just another guest at Tiff's.

A glimpse of Mo's past is revealed, while Blair and Dawn get busy with some extremely important detective work.

Mo tries his best to make Blair and Tiff's marriage happen at any cost. Keith tries to delay the SEC's sting operation.

Everything comes crashing down as Mo gets fooled without even seeing it coming, and Blair goes for revenge and tries to completely dominate Wall Street.

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

Mo receives a guest that he didn't expect; Blair and Tiff decide to go out and start looking for a new home.

Keith lands himself in a rather difficult situation, and Mo takes it upon himself to extricate him from it.

Blair's new political connection puts Dawn in a compromising position, while 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 the prospect of relocation.

A new client presents a moral quandary for Dawn; Mo, Blair, and Keith chase down leads while Tiff has an identity crisis.