Mayor of Kingstown has revamped its ensemble for the fourth series as a fresh trailer has revealed Mike McKlusky's (portrayed by Jeremy Renner) most formidable test yet.

The acclaimed crime thriller from co-creators Taylor Sheridan and Hugh Dillon centres on Mike, the unofficial 'mayor' of his industrial town where the primary business is imprisonment.

Mike serves as a go-between for prisoners, criminal organisations and law enforcement, taking charge of his family after his brother Mitch's (Kyle Chandler) devastating demise in the opening episode.

The fourth series will continue from where the third concluded, leaving a leadership void with the Russians no longer controlling Kingstown's streets.

Meanwhile, Mike's younger sibling, constable Kyle (Taylor Handley), remains behind bars af

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