(Neal McDonough) : A relentless SEC investigator who became a primary antagonist, determined to take down the firm. Charles Forstman
– The tenacious SEC investigator returns, this time probing Mike’s new hedge fund. Suspicious of Mike’s past and present, Cahill becomes a persistent threat, getting dangerously close to uncovering the secret that could destroy everyone. suits cast season 4
As the firm's glue, Donna spends much of the season trying to maintain the peace. However, the season finale sees a massive shift in her character as she decides to leave Harvey to work for Louis. (Neal McDonough) : A relentless SEC investigator who
– Donna remains Harvey’s irreplaceable secretary and conscience. However, after a life-altering realization about her feelings for Harvey, she makes a shocking career move that no one saw coming — proving she is far more than just a “spectacular ass” in a skirt. As the firm's glue, Donna spends much of
The main cast remains the heartbeat of the show, but their roles evolve significantly as the firm faces external threats and internal fractures.
– Now a named partner at Pearson Specter, Harvey finds himself on the opposite side of the table from his former protégé, Mike. His unwavering loyalty is tested like never before as he battles Mike in a high-stakes hostile takeover, all while navigating his own unresolved feelings for Scottie and a brutal power struggle with Louis Litt.