Mayor of Kingstown viewers were left wondering how Mike would find out about Iris after she died following an accidental overdose in the season 3 finale last year. Spoilers for the Mayor of Kingstown season 4 premiere, below. The Paramount+ show premiered its fourth season on Sunday, October 24, and Jeremy Renner's Mike McLusky is out of the loop when it comes to Iris' (Emma Laird) death - thanks to longtime friend Ian Ferguson (Hugh Dillon). One scene in the first episode showed Stevie (Derek Webster) receiving a report about Iris' death and handing it to Ian.