Mike returns to Pearson Specter Litt as Harvey takes the reins. Louis manages the new class of associates, while Donna and Rachel find their places in the new world order.

Harvey, Louis and Donna must get on the same page - and fast - when Bratton Gould comes after PSL for poaching an attorney. Mike and Rachel struggle to make time for their wedding plans.

Mike deals with the blowback on his prison case; Harvey tries to tell Donna about his relationship with Paula; Louis' past behavior comes back to haunt him.

Mike proposes a power move to boost business; Harvey's past causes complications; Rachel's father wants to join forces; Louis mentors Brian.

Following the merger, Harvey and Zane grapple over who should lead the firm. Louis tasks Katrina with culling the herd, but doesn't like her decision. Donna helps her see beyond the numbers.

Harvey’s good deed puts him on a collision course with the firm’s landlord, David Fox. Alex pursues Samantha's former client. A medical condition jeopardizes Katrina’s shot at Senior Partner.

Harvey and Louis assess their relationship. Donna doubts Samantha's motives for helping her.

An old foe backs the firm into a corner. Samantha and Alex try to broker a peace between clients.

Louis learns the finer points of managing Harvey. Alex is caught between Samantha and his wife.

Harvey and Donna are caught in the crosshairs when Stu is blackmailed; Samantha revisits her past.

Donna's relationship complicates a deal for Harvey and Alex. Samantha helps Louis get justice.

Harvey makes a play to get Samantha's job back. Katrina faces off against an old friend.