You know what they say: you wait ages for one Benedict Cumberbatch trailer, then two come along at once.

Just last week we brought you the trailer for The Current War, the film about 1840s electrical patents in which he plays Thomas Edison, and today (September 12) we have the promo for The Child in Time, the BBC's adaptation of Ian McEwan's novel by the same name.

This project is perhaps a little closer to Benedict's heart, as he's serving as executive producer as well as starring in the one-off 90-minute film.

Indeed, when Benedict's involvement in the film was announced, he released a statement saying it was based on a book that meant a lot to him. "I read the novel years ago and it stayed with me – profound, beautiful and very moving. Only Ian McEwan could write about loss with such telling honesty."

You can say that again, Benny. The Child in Time is about every parent's worst nightmare: Benedict plays Stephen Lewis, a successful children's author whose life is turned upside down when his three-year old daughter goes missing.

Kelly MacDonald (Trainspotting, Boardwalk Empire) plays his estranged wife, while The History Boys' Stephen Campbell Moore and Luther's Saskia Reeves are his best friends.

Prepare for some harrowing viewing:

https://www.youtube.com/watch?v=DuPXdnSWoLk

The release of a trailer suggests a fall screening for the one-off 90-minute film, which will air on BBC One in the U.K. and on Masterpiece on PBS in the U.S.

Are you looking forward to this one?