The last episode of "Suits" promises to be a dramatic one, especially after episode 15 in which fans saw Harvey (finally) confessing his feelings to Donna. The promotional video for episode 16 hints that Harvey will run away after his confession. Donna says, "You ran away, but not before you told me you love me."

KDrama Stars reports episode 16's synopsis that features SEC investigator Sean Cahill asking for Harvey's help when he cannot find a link between his corrupt boss, Eric Woodall, and an equally corrupt and menacing corporate head honcho, Charles Frostman. As usual, Harvey consults with Jessica but handling the case will also mean Harvey would have to deal with his own uncomfortable past. Melty reports that the final episode of season four will introduce Harvey's brother Marcus, played by actor Billy Miller. Apparently, his brother is known for always having financial troubles.

Meanwhile, Louis goes through a crisis and Donna helps him deal with it. The crisis seems to be a personal one since promotional photos indicate Louis holding an urn. Is someone close to Louis dead? The promotional video for the episode also shows Louis telling Donna he doesn't know how lucky Harvey is.

Elsewhere, trouble brews between Rachel and Mike who both share very different relationships with Harvey. They must confront the fact that Rachel may be Harvey's associate but Mike is Harvey's guy. The pair ultimately make a deal.

While seasoned viewers will have to bid adieu to their favorite legal drama laced with comedy for the time being, the show is famous for leaving fans with cliffhangers during the end of a season's episode. Last season it left fans wondering what Louis would do now that he knows Mike never went to Harvard. This season's end promises to change the firm forever.

"Suits" will air its final episode of season four named "Not Just A Pretty Face" on USA Network on Wednesday at 10 p.m.