Marshall also noted in the post that she told “Stranger Things” creators Matt and Ross Duffer about her health battle and “asked them to please not write me out [of the show] due to kindness or concern about my health.” She called the Duffer brothers “such lovely people I’m thrilled to know and have worked under.”

One Last Adventure: The Making of Stranger Things 5, directed by Martina Radwan, is “an inside look at the years of effort and craft that went into the final installment of the Duffer Brothers’ generation-defining series ,” per Netflix. It was produced by Angus Wall, Terry Leonard and Kent Kubena, and hails from MakeMake Productions.