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.

The transition continued to cause headaches as Harvey and Donna get their first taste of how Samantha operates and Alex tries to impress Robert Zane.

Harvey helps Samantha settle an old score. Louis faces a hurdle on the path to fatherhood.

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

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.

Alex is caught between Harvey and Zane as Louis struggles to overcome a shocking setback.

Donna's agreement forces Harvey to help David Fox. Alex comes to Zane's aid on a personal venture.

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

Harvey takes a case to send Faye a message. Louis finds a new opportunity.

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

Harvey and Samantha head out on a road trip together. Louis gets in over his head with a potential client.

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 confronts his personal issues to defend his brother. Louis sacrifices for family.

Harvey laces up for a rematch against an old foe. Louis struggles to hold the reins of the firm.

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

The firm faces the repercussions of its actions. Samantha enlists Katrina to help an old friend.

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

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.

Faye decides to take action against Harvey and Donna's relationship. Harvey looks to impress Donna's father.

Harvey defends Sutter from Cahill. Mike's past threatens to derail his mission. Rachel and Jessica seek evidence to re-open a case. Louis woos Tara.

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

Season Finale. 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.

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

Harvey, Louis and Donna search for a missing link to Sutter's inside trading. Mike takes measures to get Kevin on his side. Rachel and Jessica deliver bad news.