In [[15.12 Galaxy Brain]], [[God]] starts destroying all other universes, commenting at one point about "failed spin-offs," a reference to Wayward Sisters. Writer [[Robert Berens]] [https://twitter.com/robertberens/status/1239766273824710656 tweeted after the episode] "The arc of S1 of Wayward Sisters was always going to be broadly Dark Kaia vs the WaywardSisters, culminating in Kaia’s rescue and Dark Kaia’s tragic defeat. I always wanted to make that death right. But with limited real estate on #Supernatural I had resigned myself to Kaia just being dead. It was only by embedding it in S15 stories (Chuck, Jack’s return to the Bunker, Billie’s plan) it felt like it was possible to tie that loose end in a relevant and appropriate way."
During the course of the episode, the Winchesters team up with [[Sheriff Jody Mills]] and capture [[Dark Kaia]] who reveals that [[the Bad Place]] is dying and that [[Kaia Nieves]] is still alive and trapped in the other world. With the help of [[Merle]] and [[Jack Kline]], the Winchesters return to the Bad Place and rescue Kaia while Dark Kaia chooses to stay behind and die with her world. At the end of the episode, Kaia accepts an invitation to return to Sioux Falls with Jody. Though only Jody and Kaia appear of the Wayward Sisters cast, [[Alex Jones]] makes a voice cameo at the beginning, talking to Jody on the phone and Claire is stated to be out chasing a false lead on Dark Kaia out of cell phone range during the events of the episode but will be home soon.