Arrow: Preview and Synopsis For Epi 422 (May 18)

The CW
The CW has dropped a sneak peek and description for tonight's episode 422 of Arrow "Lost in the Flood". Check it out below.
"OLIVER FIGHTS FOR THEA; DONNA SMOAK FACES OFF WITH NOAH KUTTLER – Following the shocking events in the previous episode, Oliver (Stephen Amell) and Diggle (David Ramsey) race to rescue Thea (Willa Holland), while Felicity (Emily Bett Rickards), Curtis (Echo Kellum) and Noah (guest star Tom Amandes) join together to stop Darhk (guest star Neal McDonough)." - The CW