Though she grew up in the same neighborhood with him, the new Assistant U.S. Attorney is determined to prosecute Mafia boss John Gotti. Uncooperative FBI agents and bureaucrats will not deter the driven young prosecutor as her quest culminates in the memorable and controversial trial of the "Dapper Don."
| Actor | Role |
|---|---|
 Lorraine BraccoDiane Giacalone | Diane Giacalone |
 Tony DenisonJohn Gotti | John Gotti |
| KKathleen LaskeyCassie | Cassie |
 August SchellenbergWillie Boy Johnson | Willie Boy Johnson |
 Kenneth WelshBennett | Bennett |
 Jeremy RatchfordHarvey Sanders | Harvey Sanders |
 Ron GabrielSammy 'The Bull' Gravano | Sammy 'The Bull' Gravano |
 Ellen BurstynJo Giacalone | Jo Giacalone |
 Lawrence BayneArgento | Argento |
 Jason BlickerFrank | Frank |
| PPeter BoretskiDellocroce | Dellocroce |
| JJ. Winston CarrollDetective Teague | Detective Teague |
 Victor ErtmanisMcBratney | McBratney |
 Richard FitzpatrickBarbanel | Barbanel |
 Katie GriffinApril | April |
| RRon HartmannJudge Fisk | Judge Fisk |
 Joan HeneyBeatrice | Beatrice |
| MMeg HogarthJudge | Judge |
 Howard JeromeEddie | Eddie |
| WWendy LandsTerri | Terri |
 John NellesDolan | Dolan |
 Jackie RichardsonJuror No. 1 | Juror No. 1 |
| TTony De SantisDi Cicco | Di Cicco |
 Rino RomanoDio | Dio |
 Mark WilsonCallabresse | Callabresse |
 David BerniJohnny (uncredited) | Johnny (uncredited) |
 Vince CorazzaCharlie (uncredited) | Charlie (uncredited) |
| GGene DinoviExtra (uncredited) | Extra (uncredited) |