Thea Threatens to Kill Oliver on Tonight's 'Arrow'

Thea (Willa Holland) holds up a gun and points it at her brother in this still from tonight’s all-new episode of Arrow.

In “Lost in the Flood,” following the shocking events in the previous episode, Oliver (Stephen Amell) and Diggle (David Ramsey) race to rescue Thea, while Felicity (Emily Bett Rickards), Curtis (Echo Kellum) and Noah (Tom Amandes) join together to stop Darhk (Neal McDonough).

Arrow airs TONIGHT, May 18 @ 8PM on The CW.

Watch a promo for the episode below!

15+ stills inside…