|Season 1, Episode 5|
|Signal Fire||Family Matters|
PART 2 OF 3: BLACK MASK STEPS INTO THE SPOTLIGHT- Bruce Wayne, Jason Todd, Stephanie Brown, Harvey Dent, Dick Grayson, and James Gordon plan a sting operation to bring down Roman Sionis and his crime syndicate. Meanwhile, Sionis himself holds a meeting of the surviving Gotham crime bosses, with Barbara Gordon going undercover on her own.
- Luke Evans as Bruce Wayne/Batman
- Aaron Paul as Jason Todd/Robin
- Rose McIver as Stephanie Brown/Spoiler
- Andrew Scott as Harvey Dent
- Jonathan Rhys Meyers as Victor Fries
- India de Beaufort as Julie Madison
- Katrina Law as Nyssa al Ghul
- Rachel Skarsten as Talia al Ghul (Earth 3)
- Jessica de Gouw as Helena Bertinelli/Huntress
- Diogo Morgado as Bane
- Erin Cahill as CJ Maroni
- Crystal Reed as Sofia Falcone
- Jane Levy as Barbara Gordon
- Katie Cassidy as Laurel Lance/Black Canary
- Mehcad Brooks as James Olsen/Guardian
- with Jonathan Pryce as Alfred Pennyworth
- John Barrowman as Malcolm Merlyn
- and Bryan Cranston as Commissioner James Gordon
- Michael Kelley as Oswald Cobblepot
- Giancarlo Esposito as Victor Zsasz
- Sam Witwer as Joe Chill (flashbacks)
- Dylan O'Brien as Dick Grayson
- and William Fichtner as Roman Sionis
- Antagonists: Roman Sionis, Bane, Victor Zsasz, Nora Fries
- Barbara is promoted to the main cast as of this episode.
- Barbara was last seen in The Man in the Mirror.
- This episode takes place on January 15, 2020.