Two of the biggest remaining secrets in Port Charles could be exposed on General Hospital.

Sabrina's Life Threatened By Ava?

Ava (Maura West) and Sonny's (Maurice Bernard) secrets concerning A.J.'s (Sean Kanan) death appeared to die with A.J., but now that Carlos (Jeffrey Vincent Parise) is in police custody, that could change. He doesn't want to go down for a crime he didn't commit, and despite Ava's threats that she might hurt Sabrina (Teresa Castillo) if he blabs, he might be tempted to just tell Anna (Finola Hughes) and Dante (Dominic Zamprogna).

"Why were you after A.J. Quartermaine?" Anna asks Carlos in a preview clip for the Friday, April 18 episode.

Carlos Becomes A Suspect In A.J.'s Death?

While he is being questioned by the police, Ava is frantically hoping to find out where he is so she can convince him not to confess.

"Why the hell haven't you called me back?" she asks as she tries calling him once again.

Meanwhile, Luke's (Anthony Geary) big secret about being Julian's (Michael Devry) financial backer could be exposed to Sonny when Spencer (Nicholas Bechtel) goes to tell him what he overheard in the shed at Nikolas (Tyler Christopher) and Britt's (Kelly Thiebaud) engagement party.

"Uncle Sonny, it's me, answer the door," Spencer says in the preview clip.

However, Sonny is still being haunted by his guilty conscience over A.J.'s murder and won't be up to seeing Spencer.

"Go Away!" he yells in the clip.

General Hospital airs Monday-Friday at 2 p.m. on ABC.

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