An offshoot of the League of Assassins created by Malcolm Merlyn before his death arrive in town for Thea (Willa Holland) and a map her father left behind. The Thanatos Guild believes Thea is the key to unlocking a great prize Merlyn discovered shortly before his death. The arrival of Nyssa (Katrina Law), another former daughter of the demon who understands Thea’s desire to distance herself from that life, helps persuade Thea to fight rather than run, but uncovering just what the Guild is after will change Thea’s destiny. The episode’s B-story feels mainly like filler as Dinah (Juliana Harkavy) and Curtis (Echo Kellum) investigate corruption in the police department.
With “The Thanatos Guild” the show says goodbye to both Thea and Roy (Colton Haynes), this time clad in a more modern version of his comic character’s costume complete with ridiculous baseball hat. We’ve seen both depart the show before (multiple times) and return. Should the show, or perhaps one of the other shows, want to delve into Thea’s quest to find the Lazarus Pits the door is certainly left open for that possibility. But, at least for now, it looks like the show is saying farewell to both characters. Again.