"Scream Queens" Season 1 production is almost coming to an end, but the stars of the show have no idea how it will be concluded.

"Scream Queens" stars Lea Michele, Emma Roberts and Lauren Keyana Palmer admitted in an interview with Entertainment Weekly that they have not received any difficult part of their respective roles' scripts yet. "We only had episode 13. The final act is actually missing... they probably don't want to let us know," Roberts said.

The "We're the Millers" star believes that they will be left unaware until the show's final days to discover the killer's identity, the motives, and what is it going to be in the next year's setup. 

Ryan Murphy, the creator of "Scream Queens," said that the identity of the killer will only be revealed in the show's last episode. According to him, the production has put so much time in captivating their audience through the killer's way of getting away. Equally time and energy consuming for them are the  twists, turns and numerous flashbacks.

Fans are now speculating if the Kappa sisters are aware of the killer's identity, NYSEPost reported. Palmer clarified the rumors and said that even they have no idea. They have so many theories, but they can't reveal, the actress said.

Feather McCarthy is reportedly included in "Scream Queens" Episode 7. Based on the episode's preview clip, Wallace University Dean is looking to find revenge on McCarthy after stealing her husband away. Kappa sorority, on the other hand, will turn to an Ouija board to find out the identity behind the red devil killer.

Meanwhile, "Scream Queens" producer made some clarifications that the character of Ariana Grande is not going to return as a ghost. The series' fans know that the role of Grande was laid in its final rest in the seventh episode, entitled "Beware of Young Girls."

"Scream Queens" next episode is scheduled to air Nov. 3 on FOX Channel.