"Arrow" season 4 has finally revealed who was in the grave, and it turned out to be none other than Laurel Lance aka the Black Canary (Katie Cassidy), one of the original cast members from season 1. Speaking to Entertainment Weekly, Cassidy has finally opened up about leaving the show and what the death means for the show.

"Honestly that scene was so real shooting it because it was me saying goodbye to the team and all of us," the actress revealed. "Definitely wasn't difficult for me to get to that emotional point. For sure, it was hard, but it was very real. I felt like that was good. It was genuine, and it was real."

Cassidy did explain that she was open to come back and reprise her role if the writers could somehow squeeze her back in. The "Arrowverse," which shares a world with "The Flash" and "Legends of Tomorrow," has explored the concepts of time-travel, magic, multiple universes and more, making it more possible for her to come back in some shape or form.

It was previously reported that Cassidy will be crossing over to "The Flash" to appear as her Earth-2 doppleganger known as the Black Siren. However, this is expected to be a short one-time event. The actress has not yet announced appearing on other television series or films, but it is only a matter of time before she fills in her open schedule with a new project.

Speaking to TVLine, showrunner Marc Guggenheim revealed that Laurel's death will play a big part in the show, particularly now that there are no means of directly reviving her. The Lazarus Pit was destroyed and "The Flash" was too busy dealing with Zoom to go back in time and alter history. 

More specifically, Guggenheim revealed that the death will affect Thea (Willa Holland) and Diggle (David Ramsey) and how they approach their missions.