Gabriel Macht plays corporate lawyer Harvey Specter, who is promoted to senior partner and hires an associate attorney who did not graduate from law school.

Patrick J. Adams plays college dropout Mike Ross, who wins the associate position with his eidetic memory and genuine desire to be a good lawyer.

Sarah Rafferty plays Donna Paulsen, Harvey's long-time legal secretary, confidant, and initially the only one at the firm who knows Mike never attended law school.

Brendan Hines fills the role of Logan Sanders, Harvey's client who battles Mike and Sidwell for control of Gillis industries; he is also Rachel's former boyfriend.

In the final arc of the season, Tricia Helfer guest stars as Evan Smith, the lawyer for powerful railway company Liberty Rail.