This week on "General Hospital," Jason will discover that Sonny had slept with Nelle without Carly knowing. A new antagonist will also arrive in Port Charles while Jason and Curtis investigate the death of Morgan.

Since the previous episode, Jason has been looking for a new lead that could help them track down the mastermind behind Morgan's death. In the upcoming episode, he will continue to work on the same mission. In the course of his investigation, he will find out that Sonny previously had an affair with Nelle. Although nothing had happened between them, Sonny was fooled to believe that he had actually slept with her. Now, Nelle has Sonny at his neck and one wrong move will prompt her to tell Carly about their past.

According to reports, Sonny will open up about his problem to Jason, who promises to keep his best friend's affair a secret. Meanwhile, Carly will do something good to Nelle, and this will give Nelle second thoughts about her plan to destroy Carly. There are speculations that as Nelle gets closer to Michael, Nelle will stop her scheming against Carly.

Elsewhere in the episode, Jason and Curtis will see a new development in their probe, putting their lives at risk. Spoilers for this week's episodes hint that a new antagonist will hit Port Charles, and this antagonist is the one that Jason and Curtis have been looking for since the previous episode.

"General Hospital" airs Mondays thru Fridays, 2:00 P.M. on ABC.