Though the beginning of Season 2 of Bad Sisters might have had viewers convinced that another dead body would be disposed of by the final episode, such was not the case this time around.

"It's on that knife edge, isn't it, of comic and absolutely psychotic," Shaw, 66, tells PEOPLE as she breaks down the show's eventful season 2 finale Warning: This story contains spoilers for the season 2 finale of Bad Sisters.

Bad Sisters, a dark comedy-drama created by Sharon Horgan, concluded its second season with a thrilling finale aptly named Cliff Hanger.