John Cashin is an actor and producer. He portrayed several uncredited roles on Gotham, the most prominent being an Arkham Asylum Inmate in the series finale "Legend of the Dark Knight: The Beginning...".
- The Dark Knight Rises as Thug (uncredited)
- Marvel's Daredevil as Inmate
- Joker as Arkham Patient (uncredited)
- The Blacklist as Thug
- NYPD Blue as Undercover Officer
- Betty as Officer McNamara
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