After Suits Season 4 Episode 15, there is the possibility the relationship between Harvey and Donna will never be the same.

Now, Suits Season 4 Episode 16 promises the firm will be forever changed. What's going to happen in the finale?

We'll revisit the earlier part of the season when Sean Cahill returns with news he cannot connect his boss to corporate raider (and Mike's former employer) Charles Forstman. This will renew Harvey's desire to bring them both down.

Suits Photos from "Not Just a Pretty Face"

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Expect soap star Billy Miller to make his first appearance as Marcus Specter, Harvey's brother. He hasn't had the same successes in life as Harvey. Their conversation looks rather serious.

While Donna helps Louis with an unexpected crisis, Mike and Rachel have to come to terms with the fact that while she's Harvey's number two, Mike's still Harvey's guy. 

With the promise the firm will never be the same, are we looking at one, or more, people moving on to different things? 

Suits Season 4 Finale Promo

If you need to catch up, you can watch Suits online via TV Fanatic. Don't forget to come back here on Thursday evening for a full review of the Suits Season 4 finale after it airs!

Carissa Pavlica is the managing editor and a staff writer and critic for TV Fanatic. She's a member of the Critic's Choice Association, enjoys mentoring writers, conversing with cats, and passionately discussing the nuances of television and film with anyone who will listen. Follow her on X and email her here at TV Fanatic.