Jessica's new partnership with Darby is tested when he assigns Harvey a high-profile client who faces the loss of her company if Harvey can't prove her innocence.
Louis offers Mike a case that could change his future at the firm. Also, Harvey and Jessica team up to bring down an old nemesis who complicates their case to keep Ava Hessington out of jail.
Cameron Dennis strikes back at Harvey by arresting one of his clients for murder. Meanwhile, Katrina Bennet and a British version of Harvey arrive to stir things up at the firm.
Harvey's defense of Ava hits a roadblock when the interests of her murder trial are at odds with Louis' work to thwart a hostile takeover of Hessington Oil by a rival businessman.
Amidst a lot of office wheelings and dealings, a bet between Harvey and Huntley moves Mike onto a new case, whereby he takes Rachel along as his own "Mike" to his "Harvey."
Cameron's continuing use of shady tactics on Ava's case brings up memories of why Harvey left the DA's office to work for Jessica. Mike looks back on what cost him his one chance at a Harvard degree.
As Ava Hessington's murder trial begins. Harvey, Mike and Jessica fight off betrayal from both inside the firm and out. Meanwhile, Louis and Donna seek to even the score with those who have done them wrong.
Travis Tanner re-enters Harvey's life when Ava Hessington hires him to sue Pearson Darby Spector for malpractice. Jessica, finding out about the Mike/Rachel relationship, seeks means to guarantee protection for her firm.
With Darby finally out, Harvey and Jessica look at bringing Scottie into the firm. Louis tries to figure out how Mike got into the firm without a Harvard file.
Louis is prepared to use the smoking gun that proves once and for all that Mike did not attend Harvard, and Jessica clashes with her ex-husband's widow and lawyer when he dies and she is named executor of his will.
Harvey finally gets his chance to take on Elliott Stemple, a man who beat Harvey three times in moot court and has avoided him since. Meanwhile, Dana Scott picks a fight with Louis.
While Harvey and Mike have unpleasant work to do for one of their biggest clients, Louis faces a huge challenge and Rachel tries to collect on an old debt.
A persistent attorney goes after one of Harvey's clients; Mike is faced with a difficult decision; former name partner Charles Van Dyke returns with revenge on his mind.
Mike is brought into the US Attorneys office for questioning by an attorney who hates dirty lawyers. Meanwhile, Dana Scott re-evaluates her relationship with Harvey.