Arrow Duo Talk Katie Cassidy's Exit ('It Was Like Losing a Limb'), Xover Wishes

Despite having had experience bidding original cast members such as Colin Donnell and Susanna Thompson adieu in seasons past, Arrows Willa Holland says that Katie Cassidy’s shocking end-of-Season 4 exit “felt like losing a limb.”

Holland weighs in on Cassidy’s departure in the first embedded audio clip below, from AudioBoom’s coverage of this weekend’s MCM Comic Con in London, saying, “That was one of the most difficult things that any of us ever had to film,” because whereas Donnell and Thompson were killed off in Seasons 1 and 2, “This was four years in, so we were all so close at this point.”

That said, Holland reminds that The CW’s DCTV universe is forever finding ways to bring back characters — Cassidy already has appeared on The Flash, as Earth-Two’s Black Siren — so, “It’s not like she’s gone.”

Speaking of Earth-Two: In this second clip, both Holland and Katrina Law (who recurs as Nyssa) share their excitement about the coming TV season’s announced four-way crossover involving Arrow, The Flash, Legends of Tomorrow and CW import Supergirl. “All I’ve got to say is I want to be on Earth-Two,” Holland says, with Law echoing the sentiment. “It seems so much better than regular Earth!”

The actresses proceed to recount how much additional work is required to pull off even a two-show crossover. Law, for example, says that when she has arrived on the Arrow set after the cast and crew have toughed one out, “Everyone is completely shattered, but the honest-to-goodness response from every single one of them is we love doing the crossovers, because the fans apreciate it so much.”

Want more scoop on Arrow, or for any other show? Email insideline@tvline.com and your question may be answered via Matt’s Inside Line.