S01 Episode 1

Owney Madden: Duke of the Westside/John 'Red' Hamilton and the Dillinger Gang

Notorious gangsters Owner "Killer" Madden and John "Red" Hamilton, who led similar lives that ended quite differently.

S01 Episode 2

Mickey Spillane: The Gentleman Gangster/Jimmy Coonan and the Westies Gang

Mickey Spillane, known as "the last of the gentleman gangsters,' and Jimmy Coonan, who led the much-feared Westies.

S01 Episode 3

Jimmy "The Gent" Burke/Danny Greene: The Celtic Warrior

S01 Episode 4

Frank 'Dunie' Ryan: The West End Gang/The Stopwatch Gang

S01 Episode 5

Brian O'Dea/Pat Nee

S01 Episode 6

Frank 'The Irishman' Sheeran/Whitey Bulger

Season 1

The Irish Mob