Calling season 1 of the Irish series "breathtaking," Shaw tells PEOPLE it didn't take much to convince her to join for season 2It didn't take much to convince Fiona Shaw to join the Garvey sisters' gang.

O n the last day of filming season one of “Bad Sisters,” a whodunit about a tightknit group of siblings and the murder of one of their abusive husbands, cast member Eve Hewson

Another season of Bad Sisters from creator Sharon Horgan, based on Malin-Sarah Gozin’s 2012 Belgian television series Clan, is underway on Apple TV+ with all five Garvey sisters returning alongside newcomers Fiona Shaw and Thaddea Graham.

Sharon Horgan, Dave Finkel, and Brett Baer's Apple TV+ series returns to catch up with the Garvey sisters and their late prick of a brother-in-law.

In hindsight, it figures that Bad Sisters’ Roger couldn’t possibly bear up under the weight of such a massive secret. So when the Apple TV+ series returns for Season 2 (the first two episodes dropped today;

The series unfurled while skipping between timelines as it became clear that the quintet of Garvey sisters each had their own reason for despising their sister Grace's (Anne-Marie Duff) husband, a mesmerisingly menacing John Paul (Claes Bang.