“Crossing Lines” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)
CURTIS GOES UNDERCOVER FOR ARGUS — Still in prison, Oliver (Stephen Amell) faces his biggest challenge yet. Meanwhile, Felicity (Emily Bett Rickards) gets an intriguing offer, and Diggle (David Ramsey) asks Curtis (Echo Kellum) to go undercover for ARGUS. Ben Bray directed the episode written by Emilio Ortega Aldrich & Tonya Kong (#703). Original airdate 10/29/2018.