For more details on what to expect from this instalment of Arrow (titled “Beacon of Hope”), here’s the official synopsis:
Brie Larvan (guest star Emily Kinney) breaks out of jail and turns up at Palmer Tech threatening to kill everyone unless she gets the bio-chip that is implanted in Felicity’s (Emily Bett Rickards) spine. When Oliver (Stephen Amell) realizes that Felicity, Thea (Willa Holland) and Donna (guest star Charlotte Ross) are trapped in Palmer Tech with everyone else, he looks to a surprising ally to help Team Arrow save the day.
Arrow has recently started shifting the focus from Damien Darhk to Malcolm Merlyn, and while this certainly sounds and looks like an exciting episode, it doesn’t appear as if it’s going to move that story on too much. As a result, it may be best not to expect any more clues about which fan-favourite Arrow character is in that grave.