Semi-true story from Julian Fellowes sets churchgoing Kansas lady the challenge of keeping the girl about to become Louise Brooks in line in 1920s New York

Written by Julian Fellowes, who brought us Downton Abbey and recent series The Gilded Age, and directed by Michael Engler, who worked on both the aforementioned, this based-extremely-loosely-on-fact costume drama adapted from a novel by Laura Moriarty should hit the sweet spot for fans of Fellowes’ particular variety of saucy-soapy period pieces. Like so much of Fellowes’ work, it effectively flatters the viewer by assuming he or she must be familiar with certain historical figures (in this case, early cinema star Louise Brooks) and then appears to dish the dirt on them through the eyes of a character from another class or at least different social sphere.

Here, that parallax view is from the perspective of Norma – played by Lady Grantham herself, Elizabeth McGovern, taking a lead role for a change. When first met in 1922 in Wichita, Kansas, Norma seems like a nice, churchgoing lady of a certain age, respectably married to a lawyer (Campbell Scott) and mother of two practically grownup sons. When she hears that local pianist Myra Brooks (Victoria Hill) is in search of a chaperone to accompany her precocious but exceedingly talented teenage daughter Louise (Haley Lu Richardson) to New York to attend a prestigious dance school, Norma mysteriously jumps at the chance. Turns out she has a good reason: she was actually raised in an orphanage there for a short while before being adopted by kindly midwestern farmers, and now wants to find her birth parents.