Expect your week to be a fun and intense-filled week as a new episode of hit TV series 'Arrow' is about to be aired. Revelations and secrets are going to be discovered in this week's episode as the cast of the action-crime series continues to battle it out with their villain Prometheus. Warning: Spoilers ahead!

Episode nine is titled "What We Leave Behind" and it is the show's midseason finale. The synopsis for the upcoming episode, via TVGuide, reads: "After Prometheus attacks Curtis, Oliver realizes Prometheus knows all of Team Arrow's secret identities and is planning to come for them one by one. Meanwhile, Felicity and Detective Malone discover a clue that links Prometheus to Oliver's past."

The Arrow team is in grave danger all thanks to Prometheus and his assistant Evelyn. Yes, you read that right. Evelyn now works with Prometheus and it was her who warned Oliver that he has to save the city. It's not just the fans who are going to be shocked with this revelation as Oliver himself was shocked as he saw Evelyn with Prometheus.

in the promo video released for the upcoming episode, Evelyn aims an arrow at Oliver saying "This city needs saving from you." Meanwhile, Prometheus is going to serve up some hot dish as he reveals to Oliver that he knows everything about him and the others and he is going to use these information to harm them. First on the list is Curtis and he is badly hurt. What will be Oliver's plan of attack?

On the other hand, it's not just Oliver that's going to be busy next week. Turns out, Felicity is still uncovering clues on Oliver's connection with Prometheus. According to an article by Christian Times, Felicity will ask for Detective Malone's help and it will successfully discover one information about Oliver. What could that clue be? Find out what it is as 'Arrow' airs on December 7, Wednesday, 8 p.m. on The CW.