Viewers may get to witness the death of Regina Mills in the upcoming episode of "Once Upon A Time" season 6.

The promo for episode 6 came out two days ago and created quite a lot of buzz among fans, especially since it hinted the possible demise of Regina Mills. According to reports, the death of Regina will have to take place in order to take down the Evil Queen once and for all. The twist that was revealed in the previous episode involving Dr. Hyde and Jekyll's lore will reportedly cost the life of Regina in episode 5.

In the previous episode, Hook tried to kill Dr. Jekyll through a spear in his heart to save Belle. Since both of them died, he learned that Mr. Hyde was actually linked to his life, and that killing the original would mean killing the alter ego. Thus, they discovered that the secret to demolishing the Evil Queen is by killing Regina.

In the upcoming episode, Regina is in danger of losing her life. It remains to be seen if fans will finally see the death of the character next episode, but considering how significant her role is in the series is, some speculate that there is no possible way for the showrunners to kill her off.

Fans of Regina can only hope that she will be able to get away from the curse so they can kill the Evil Queen without having to kill her. On the other hand, some also speculate that the Evil Queen will learn about the secret and will have her hands on everyone's neck, preventing them from killing her.

"Once Upon A Time" season 6, episode 5 airs Sunday, 8:00 p.m. on ABC.