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Wait! Before we begin i'd like you to know that in round table interview at San Diego Comic Con producer Marc Guggenheim offered some hints about the crossover between all four DC shows. “It’s an external threat from outside the shows that will involve Supergirl coming over to Flash, then Arrow then Legends of Tomorrow,” Guggenheim said. “I don’t like to oversell. She is going to be coming over but we’re not going to do a full on Supergirl crossover episode. I don’t want to give you the wrong impression.” We can't wait!

The Flash season 3 will premiere Tuesday October 4th at 8pm on The CW, Arrow season 5 will premiere in the same timeslot on Wednesday October 5th, Supergirl season 2 on Monday October 10th, and Legends of Tomorrow season 2 on Thursday October 13th, happy!

SOURCE: http://www.kaboom.com.ng/2016/07/flash-arrow-supergirl-legends-of-tomorrow-premiere-dates.html