Kaley Cuoco stepped out of her comfort zone after The Big Bang Theory ended. She decided that one of her first big post-Penny passion projects would be a television adaptation of Chris Bohjalian's book The Flight Attendant, and she worked hard to make her vision a reality. In addition to starring in the HBO Max series, she produced it. This gave her a lot of say in how her character, Cassie Bowden, was portrayed, but she didn't shy away from filming sex scenes that made her rather uncomfortable.