The new promo video for the new "Pretty Little Liars" season 6 episode shows chaos between the girls and the new big bad villain coming to town.

According to International Business Times, the return episode which will air in January shows the reunion of Alison (Sasha Pieterse), Aria (Lucy Hale), Emily (Shay Mitchell), Hanna (Ashley Benson) and Spencer (Troian Bellisario), 5 years after they went to separate ways to pursue their dreams. Although the girls seem to have moved on from their past troubles, one circumstance will force them to go back to Rosewood.

In the promo video for episode 12, Alison can be seen talking to CeCe (Vanessa Ray) who appears to be in a mental institution after the police caught her. However, a new villain will be coming to town to cause more trouble than A has ever done. When the girls realize this, Spencer can be heard saying, "It's happening again, isn't it?" In another scene of the video, chaos begins as Ezra (Ian Harding) can be seen shouting at the girls telling them to leave his apartment. In another scene, Toby (Keegan Allen) is shown holding a gun while Emily was seen in a hospital gown.

In the official synopsis for the episode, it was said that the girls will be joining forces once again to fight the new villain while their relationship with each other and with the people around them are put to the test while they try to move forward with their lives without going back to their tragic past.

On other news, Melty earlier reported that actress Sasha Pieterse announced her engagement this month. The 19-year-old actress posted a picture of her and her fiancé capturing the special moment of his proposal. Details about the wedding have not yet been revealed but fans are still waiting if Pieterse will reveal anything soon on her social media accounts.

"Pretty Little Liars" season 6 will return on Jan. 12.