Katrina Law is set to make a return on "Arrow," reprising her role as Nyssa al Ghul in multiple episodes leading up to a battle between Nyssa and her half sister Talia al Ghul (Lexa Doig) in the Season 5 finale.

Nyssa's return, announced via Entertainment Weekly, will presumably be prompted by Oliver Queen to help finally taking down this season's villain Adrian Chase, aka Prometheus. After disbanding the League of Assassins, not much is known about what Nyssa has been up to; her last appearance was attending Laurel Lance's funeral in Season 4.

RELATED: Manu Bennett's Deathstroke Will Return, Confirms Stephen Amell

As for Talia, this season's flashbacks revealed that she was responsible for Oliver's training in Russia. After discovering how her father Ra's al Ghul died, she decided to train and join forces with Prometheus.

In addition to Law's return, Manu Bennett will reprise his role as as Deathstroke in an upcoming episode. Stephen Amell, the Emerald Archer himself, confirmed the news of Slade Wilson's comeback on Twitter this week.

RELATED: Arrow Will Explore Oliver & Felicity's Breakup in Season 5

"Arrow" is currently on a brief break and will resume normal programming with an episode titled "Dangerous Liaisons," airing Wednesday, April 26 at 8 pm ET/PT on the CW. The series stars Stephen Amell, Emily Bett Rickards, David Ramsey, John Barrowman, Willa Holland and more.