After a brief hiatus, "Criminal Minds" will return in May to wrap up Season 9 with a two-part finale where the FBI's elite Behavioral Analysis Unit (BAU) will take a trip to Texas to investigate murders with a religious overtone.

According to CarterMatt, "Battlestar Galactica" alum Michael Trucco will make a guest appearance on at least the first part of the finale, which is titled "Angels," on May 7. The final episode, titled "Demons," will then premiere the following week on May 14.

Trucco will be in character as Owen McGregor, while Brett Cullen will guest star as Preacher Mills. In addition, Esai Morales will reprise his role as Mateo Cruz.

According to BroadwayWorld, CBS released an official synopsis of "Angels" that states: "When the BAU is called to Texas to consult on the murders of prostitutes, evidence points to killings with religious overtones. But as they delve further into the investigation, the team could put their lives at risk, on part one of the two-part ninth season finale."

"Criminal Minds" star Shemar Moore recently hinted that his character Derek Morgan will get shot in the season finale. On April 12, he shared two photos on Facebook of Derek Morgan's gunshot wound.

In one picture, Moore shows off a bloody gash on his left arm. He captioned the photo writing, "CRIMINAL MINDS FINALE EPISODE.. Season 9... YES, there WILL be a season 10!!! But DEREK MORGAN and the team have to deal with a S--T STORM in the FINALE!!! Actually Mathew aka Dr Reid aka Pretty Boy tried to ERASE MY TATTOO WITH HIS THUMB!!!! Hahahaha... HOLLYWOOD MAGIC!!!!"

The second photo shows the actor pouting while showing the cut on his arm. He explained how Morgan was injured in the caption writing, "DEREK MORGAN GOT GRAZED BY A BULLET!!!! I'm too fast... Can't hit what you can't see!!!! CRIMINAL MINDS FINALE EPISODE for Season 9..."

"Criminal Minds" S9E23, "Angels" will air on Wednesday, May 7 at 9 p.m. EDT on CBS.