The Thanatos Guild


 * For the group of the same name, see Thanatos Guild (group).

"The Thanatos Guild" is the sixteenth episode of the sixth season of Arrow, and the one-hundred-thirty-first episode overall. It aired on March 29, 2018.

Synopsis
Nyssa al Ghul returns to Star City to warn Thea that a group of renegade League of Assassins members are planning to attack her. This group, led by Athena, is intent on finding a mysterious box that Malcolm left behind and will stop at nothing to get it. Nyssa helps Oliver come to a life-changing realization.

Trivia

 * The title of this episode comes from the name of another group of League of Assassins that was supposed to be led by Malcolm until Athena took charge.
 * When Roy and Felicity are trying to figure out how to defuse the bomb Roy says “I can freeze it, I’ve done that before.” This is a reference to the season three episode The Calm where Roy freezes a bomb that’s about to go off underneath Rockets Arena (per Felicity’s instructions nonetheless).
 * The hat Roy wears is a call back to him wearing a hat in the New 52 Red Hood and the Outlaws series.
 * Felicity makes contantly reference to the Hellraiser franchise in this episode.
 * This episodes marks Willa Holland's last appereance as Thea Queen in the show.