AceShowbiz - General Hospital spoilers reveal intense drama surrounding WSB double agent Ross Cullum (played by Andrew Hawkes) and Marco Rios (Adrian Anchondo) during the week of March 16-20. Marco, who is the son of Jenz Sidwell (Carlo Rota), finds himself caught in a dangerous act of betrayal that could lead to deadly consequences.

This week on General Hospital, Marco continues his covert attempts to obtain Dr. Britt Westbourne’s (Kelly Thiebaud) vital medication. Britt suffers from Huntington’s disease and relies heavily on her medication to manage her symptoms. She is currently working with Cullum and Sidwell on a secretive project linked to her father, the notorious Cesar Faison (Anders Hove).

Marco has promised to assist Lucas Jones (Van Hansis) with an effort to replicate Britt’s medication, aiming to free her from the control of Sidwell and Cullum. However, his attempts to access the safe containing Britt’s medication are repeatedly thwarted. During the upcoming week, Marco will be caught red-handed trying to retrieve the medication, and Cullum will confront him directly.

Fans of the show are well aware of how ruthless Cullum can be. If he perceives betrayal, the consequences are severe. Cullum is even suspected to be responsible for firebombing Sonny Corinthos’s (Maurice Benard) penthouse, an attack that left Michael in critical condition. While Sidwell might show some leniency towards his son despite his own merciless nature, Cullum is unlikely to tolerate any disloyalty.

This confrontation could mark the end of Marco’s storyline on General Hospital. There has been speculation among fans about Marco’s future ever since the show released new cast portraits in the fall of 2025, which notably excluded Marco along with Henry "Hank" Dalton (Daniel Goddard) and S. Vaughn (Bryce Durphee). Dalton was shot by Sidwell in November 2025 and left the canvas, while Vaughn officially exited in January 2026.

Given this context, many anticipate that Marco’s time on the show may be running out. Cullum is intelligent and likely sees through Lucas and Marco’s plan from afar. Sidwell is also aware that Lucas possesses more knowledge than he should about the cold fusion project, information passed on by Pascal (Marc Forget). It’s possible that Cullum has been informed off-screen about these developments.

If Cullum believes Marco poses a threat due to suspicious activities, he is expected to act decisively to eliminate the problem—even if it means going against Sidwell. This upcoming storyline promises high tension and significant impact on the characters involved.

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