From VancouverFilm.Net, take a look at 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"...