Arrow Gets A New Regular, Lends Out Cassidy

“Arrow” actress Katie Cassidy is set to guest star in the second-to-last episode of the second season of The CW’s “The Flash”. Cassidy will play an Earth-2 version of Laurel Lance whose Black Canary goes by the name Black Siren.

That name is actually a character from the “Justice League” animated series that was based on the golden age version of Black Canary. The news was confirmed today with EW by “Arrow” executive producer Marc Guggenheim.

At the same time, TV Line reports that actor Echo Kellum and his Palmer Technologies character Curtis Holt is being upgraded to a series regular in the upcoming fifth season of the series.

Curtis’ comic book counterpart becomes the superhero Mr. Terrific, but that storyline hasn’t begun to play out at this point. The character, a tech genius and married gay man, became involved with Team Arrow in last week’s episode, helping them out on a mission.