This was the biggest question I had going into Bad Sisters Season 2, the follow-up to Sharon Horgan's excellent 2022 how-dunnit about a family banding together to kill their sister's abusive husband.

Sharon Horgan, Anne-Marie Duff, and the cast of “Bad Sisters” react to the shocking premiere twist—and tell us why it had to be done.

Wondering where you've seen Angelica, Una and the other new Bad Sisters characters before? Here's a handy guide.