From VancouverFilm.Net, Sneak Peek footage, plus images from the "Arrow" episode "The Thanatos Guild", written by Beth Schwartz, Ben Sokolowski and directed by Joel Novoa, airing March 29, 2018 on The CW:
"...'Nyssa al Ghul' returns to 'Star City' to warn 'Thea' a group of renegade 'League of Assassins' members are planning to attack her.
"Led by 'Athena', the group is intent on finding a mysterious box that 'Malcolm' left behind and will stop at nothing to get it.
"Then Nyssa helps 'Oliver' come to a life-changing realization..."
Click the images to enlarge and Sneak Peek "Arrow: The Thanatos Guild"...