Set in an Irish neighbourhood in Providence, the series reflects around two brothers on opposite sides of the law: one a gangster (Jason Isaacs) and the other a politician (Jason Clarke).
Cast: Jason Isaacs, Jason Clarke, Annabeth Gish, Kevin Chapman, Fiona C. Erickson, Brian Scannell, Fionnula Flanagan, Kerry O'Malley, Billy Smith, Madison Garland, Ethan Embry, BrĂan F. O'Byrne, Tina Benko, Kailey Gilbert, Frank Ridley, Matt Servitto, Georgia Lyman, John Fiore, Karl Bury
Tommy becomes heir apparent for Speaker when Donatello's condition worsens; Freddie maneuvers to get on Tommy's good side. With the mob, the state police, and feds after him, Michael's obsession with Colin puts everyone in jeopardy.
Kath and Colin worry about what Michael might be capable of if he becomes too suspicious of their relationship; Eileen goes stir crazy when her pregnancy confines her to bed; Tommy asks for Michael's help with the Waterfront investigation.
Eileen worries that her family will never leave The Hill when Speaker Donatello draws Tommy back in to help pass the budget; Declan tries to link Tommy with Nozzoli; Rose's attachment to Colin fuels Michael's anger and paranoia.
Tommy tries to charm Declan into sharing information about his corruption probe; Rose learns the truth about her health; tension builds between Michael and Colin as they help Freddie plan a heist.
The Labor Day holiday weekend finds Michael increasingly paranoid and edgy; Tommy proposes a radical lifestyle change to Eileen; Declan and Cassie's getaway highlights the growing problems in their rocky marriage.
A fire kills several Latino squatters and a firefighter, leaving Tommy struggling with the political fallout; Colin's torch for Michael's girlfriend Kath begins to affect his work; Declan uncovers a lead and brings in another investigator.
Tommy strong-arms the mayor for his support of a development deal, but hits a roadblock due to Michael's business dealings; Rose investigates her mysterious ailment; Eileen is passed over for promotion due to her pregnancy.
In the third season debut, a disgruntled Tommy mulls a risky career change, and orders Declan to launch a secret corruption probe; Rose attempts to hide her deteriorating health at her birthday party.