Oliver won't be able to take down Prometheus alone, but the good news is he doesn't have to. You might think he would just rely on the rest of the Team Arrow for help, which includes allies like Diggle and Curtis, but that doesn't seem to be the case.

Executive producer Wendy Mericle shared a few details about the upcoming Arrow season finale and hinted that help is coming, but not from where you expect (via EW). “The alliances are going to be very surprising. You’re not going to believe who Oliver is working with to defeat Prometheus. It’s going to be really emotional. It’s going to be all about Oliver’s family, but not the family we’re thinking of right now. It’s going to end in a giant explosion, but not where we think it’s going to end, and the emotional punch is going to be bigger than the actual physical part of the bombs going off.”

Speaking of the season finale, Mericle also addressed previous seasons' reliance on Star City destruction. That will not be the case with season 5. “I’ll just say this: Star City is not in jeopardy,” she told Rotten Tomatoes at Palyefest 2017. “As we’ve joked before, there’s always a terrorist attack on Star City in May. Not this time. Prometheus is a very personal villain, very psychological villain and the ending will be appropriate to that.” You can view the synopsis for "Dangerous Liaisons" below.