Requiem

Requiem is a Welsh limited series co-produced by the BBC and Netflix. It was broadcast on BBC One from February 2 to March 16, 2018, before being released on Netflix internationally on March 23, 2018.

Summary
"A young woman investigates the historic disappearance of a girl from a small Welsh village, unraveling her own identity in the process. Requiem is written by Kris Mrksa (episodes 1-4 and 6) and Blake Ayshford (episode 5). The series is directed by Mahalia Belo, produced by Susan Breen and executive produced by Willow Grylls, Elaine Pyke and Charlie Pattinson for New Pictures, Kris Mrksa and Christopher Aird for BBC."

- Netflix press release