'Pretty Little Liars' season 7 finale spoilers news: PLLs finally confront their old foes; Will Mary Drake's secret child be revealed?

All hell breaks loose in the upcoming summer finale episode of Freeform's hit mystery drama "Pretty Little Liars" season 7.
Mayhem ensues when the PLLs finally confront their enemies head-on in next week's episode titled "The Darkest Knight." According to the official synopsis, the PLLs will face their old foes and the end will lead to someone paying the ultimate price. One of the ladies will learn a shocking secret about her past that could seismically impact everything. Meanwhile, another Liar discovers something about her future that could change her course forever.
The episode's hashtag #PLLDeathTrap hints that someone will die in the huge fight between the PLLs and their enemies. In the promo trailer for episode 10, Hanna (Ashley Benson) tortures Noel and forces him to admit his true identity. The next scene cuts to the ladies worried and scared after finding out that Noel (Brian Daugherty) managed to escape. "Did you remember to tie him up?" Spencer (Troian Belisario) asks the group. Noel later re-appears with Jenna (Tammin Sursok) as she points a gun to the PLLs, saying: "Tonight, you get to be me." The final moments of the clip hint that one of the ladies may have been hurt.
Executive producer Marlene King previously teased that season 7 is the "deadliest" season in the show's history. Though she did not give away details on when Mary Drake's (Andrea Parker) secret child will be revealed, she confirmed that fans already know the person. King also mentioned that a lot of fans are already close to figuring out his/her identity. "Some people are coming close to figuring it out, which is good," King told Entertainment Weekly. "As we get into these next 10 episodes we've been trying to give enough information where we can't confirm or deny it but fans can figure it out. There are definitely dots to connect to get to the end."
For fans who want to catch up on all the drama, Freeform (previously ABC Family) will air an all-day marathon of "Pretty Little Liars" season 7 on Tuesday, Aug. 30 starting 11 a.m. EST. It will run up to the one-hour summer finale at 8:00 p.m. EST.