Barry is thrilled when Oliver, Felicity and Diggle come to Central City to investigate a case involving a deadly boomerang.
The crossover continues on Arrow S03E08 The Brave and the Bold.
Quest roles:
Stephen Amell(Oliver Queen / Green Arrow / The Spectre), David Ramsey(John Diggle / Spartan), Patrick Sabongui(David Singh), Robbie Amell(Death Storm), Emily Bett Rickards(Felicity Smoak), Sharon Bell(Female Restaurant Patron), Paul Anthony(Roy G. Bivolo / Rainbow Raider), Michelle Choi-Lee(Teller), Peter New(Widgick), Trevor Carroll(Max Mercury), Jason William Day(SWAT), Demord Dann(Security Guard), Thabo Ketshabetswe(Painter), Gary Pettinger(Restaurant Patron), Anja Savcic(Young Mother), Anna Hopkins(Samantha Clayton), Natalie Farrow(Pretty Woman), Roman Blomme(Street Punk), Devin Pihlainen(Cute Guy)