|The Roman Empire|
|Season 4, Episode 3|
|Fragile Peace||The Long Halloween|
- Ben McKenzie as Jim Gordon
- Donal Logue as Harvey Bullock
- David Mazouz as Bruce Wayne (credit only)
- Morena Baccarin as Lee Thompkins (flashbacks)
- Sean Pertwee as Alfred Pennyworth (credit only)
- Robin Lord Taylor as Oswald Cobblepot
- Erin Richards as Barbara Kean
- Camren Bicondova as Selina Kyle (credit only)
- Cory Michael Smith as Edward Nygma (credit only)
- Jessica Lucas as Tabitha Galavan (credit only)
- Chris Chalk as Lucius Fox (credit only)
- Crystal Reed as Sofia Falcone
- John Doman as Carmine Falcone
- with Anthony Carrigan as Victor Zsasz
- and Alexander Siddig as Ra's al Ghul (credit only)
- James Carpinello as Mario Calvi (flashbacks/hallucinations)
- Antagonist: Oswald Cobblepot
- Bruce, Alfred, Selina, Nygma, Tabitha, Lucius, Butch, and Ra's do not appear in this episode. Lee only appears in flashbacks.
- Title meaning: the Falcone crime family, due to being of Italian descent, is sometimes referred to as Gotham's "Roman Empire". Additionally, Sofia quotes the famous phrase "Rome didn't fall in a day" to Jim when referring to Oswald's control of the underworld.
- The majority of this episode is focused around the Falcone family, specifically their interpersonal breakdown.
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