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 butts heads with his partners over a bold move. Mike pursues a pro bono case with the legal clinic. Donna's actions raise tough questions at the firm.

Louis and Harvey wrangle with new firm dynamics. Mike's latest success brings him unexpected new business. And Rachel's leadership is challenged by an insubordinate associate.

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 juggles his work obligations with his promise to help a family; Harvey asks for Louis's discretion in a sensitive matter; Donna vets a possible addition to the firm.

Mike deals with blow-back on his prison case. Harvey struggles to tell Donna about his relationship with Paula. Louis's past poor behaviour comes back to haunt him.

Harvey learns the scope of Alex's involvement in the prison case, while Mike races to keep it alive. Lipschitz forces Louis out of his comfort zone. Donna struggles with her work/life balance.

Harvey and Mike seek outside help to overcome an impossible situation. An unexpected encounter derails Louis's search for a new associate. Donna receives a surprising proposition.

Mike proposes a power move to boost business, but Harvey's past complicates matters. Rachel is surprised when her dad offers a chance to join forces. Louis mentors Brian.

Mike and Harvey's power move is countered, putting their backs up against the ropes. Rachel fears her father's judgment is clouded by the past. Louis aids Alex when his client comes under fire.

Harvey and Louis fight to protect the future of the firm from its past; Alex worries Mike's instincts could risk a client relationship; Donna and Harvey delve into the aftermath of their kiss.

Harvey has to call in an old debt for the firm. Mike goes toe-to-toe with an unlikely opponent. Louis comes to terms with his new role.

Harvey is forced into a difficult decision when the impossible is asked of him. Mike and Rachel try to make time to discuss their future. Louis struggles with the rules of his relationship.

Mike's attempt to distract Harvey with a case backfires. Louis tries not to let emotion affect his judgment in a legal duel. Donna finds a way to prove her worth to the firm.

Harvey and Louis are blindsided by an attack against Specter Litt. Meanwhile, Mike can't turn his back on the clinic when a class action suit overwhelms Nathan and Oliver.

It's all hands on deck as Louis, Donna, and Alex defend the firm, while Harvey aids Jessica on a case. Mike and Rachel juggle their commitments to the firm, the clinic, and each other.