Jodie Comer has been cast in the lead role of the upcoming HBO limited series “ The Chain .” The series was originally announced in January under creator Damon Lindelof’s overall deal with HBO. “The Chain” is based on the book of the same name by Adrian McKinty. HBO has given the show an eight-episode order. Comer will play Rachel, who is described as “a suburban mom who must consider the unthinkable when her daughter is kidnapped.” Popular on Variety Comer is perhaps best known for her starring role in the series “Killing Eve,” for which she won numerous accolades, including an Emmy for outstanding lead actress in a drama as well as a BAFTA TV Award. She has also starred in shows like “My Mad Fat Diary,” “Thirteen,” and “Doctor Foster.” In film, Comer has played leading roles in features like “The Bikeriders,” “The Last Duel,” “Free Guy,” and “28 Years Later.” She is repped by Independent Talent Group and WME. Lindelof will serve as writer, executive producer, and showrunner on the series.…