He has become aware that Sonny (Maurice Bernard) and Julian (Michael DeVry) know he is an impostor and are digging to figure out his real identity, which will cause Fluke to take extreme measures on General Hospital.

Sonny & Julian Try Proving Fluke's Identity

He managed to get a hold of Sonny and Julian on the cell phone they confiscated and began using for their purposes while in Pentonville, and issued them both a warning that what they did would cause big problems for their sons-Michael (Chad Duell) and Lucas (Ryan Carnes)-meaning the two could be in grave danger as a result.

"Stay the hell away from Michael," Sonny snarls to Fluke in a preview clip for the Thursday, Jan. 22 episode.

Sonny Realizes Who Fluke Is

However, Fluke won't likely feel so threatened by Sonny and could repeat his warnings before hanging up-causing Sonny to instead inform Shawn (Sean Blakemore) and Duke (Ian Buchanan) of the threat in an attempt to get some last minute protection for his son.

"Michael is in grave danger," Duke says to Shawn in the clip.

However, Shawn can't get near Michael to try and protect him from anything Fluke does to him, because Michael was granted a restraining order-something he will reiterate the importance of to Lucas as they continue discussing the situation.

"I don't want Sonny's protection," Michael admits.

Because of his refusal to receive some help from his adoptive father, Fluke could easily get a hold of both him and Lucas-and Sonny and Julian could find themselves unable to save their sons from falling victim to the evil plot.

General Hospital airs Monday-Friday at 3 p.m. on ABC.