Sammy 'The Bull' Gravano was mafiosi. He started out as a soldier, but his talent for murder, including the slayings of his best friends, his wife's brother and his own boss, Paul Castellano, saw him rise to under-boss in the Gambino crime family. However, betrayals within the family saw him break the code of silence and became the highest ranking member of the mob to turn into a rat - 'a rat in a suit,- assisting the government to finally put away the Teflon Don, John Gotti.
| Actor | Role |
|---|---|
 Nicholas TurturroSammy 'The Bull' Gravano | Sammy 'The Bull' Gravano |
 Tom SizemoreJohn Gotti | John Gotti |
 Debi MazarDeborah Gravan | Deborah Gravan |
 Abe VigodaPaul Castellano | Paul Castellano |
 Philip Baker HallToddo Aurello | Toddo Aurello |
 Kirk AcevedoNicky Scibetta | Nicky Scibetta |
| AAdam J. RothThe sign painter | The sign painter |
 Frank VincentFrankie DeCicco | Frankie DeCicco |
 Lenny VenitoSal DiMaggio | Sal DiMaggio |
 Johnny WilliamsAngelo Ruggiero | Angelo Ruggiero |
 Frankie ValliFrank LoCascio | Frank LoCascio |
 Michael ImperioliLouie Milito | Louie Milito |
 Vincent PastoreMikey De Batt | Mikey De Batt |
| AAlfred NittoliMotts Cassella | Motts Cassella |
 Kathrine NarducciLinda Milito | Linda Milito |
 Tony SiricoTommy Gambino | Tommy Gambino |
 Frank MinucciNorman Du Ponte | Norman Du Ponte |
 Jeffrey DonovanAgent #1 | Agent #1 |