Requiem is a six-part British television drama serial, written and created by Kris Mrksa and directed by Mahalia Belo. It is a co-production between New Pictures for the BBC and Netflix. It first broadcast on BBC One on 2 February 2018, with all six episodes being released via BBC iPlayer on the same day.

The series encompasses elements of both the supernatural and thriller genres. It stars Lydia Wilson as Matilda Grey, an accomplished cellist whose life is turned upside down following her mother's suicide, which raises a number of questions about her identity and events in her past. Joel Fry stars as her best friend and fellow musician Harlan "Hal" Fine. James Frecheville, Sian Reese-Williams, Brendan Coyle, Claire Rushbrook, and Richard Harrington are also credited as principal members of the cast.

The series began filming in March 2017, with filming taking place in Wales from June 2017 and supported by funding from the Welsh Government. Location filming took place at Cefn Tilla Court in Usk, Newport, Wales and Dolgellau. It was produced by New Pictures, whose previous credits include The Missing.

It was available internationally on Netflix from 23 March 2018, and a DVD was released via Acorn Media on 19 March 2018.