But, the beloved British star just signed on for yet another project.
Cumberbatch has gone as far as to create his own production company called SunnyMarch TV. The film explore how Lewis' marriage is effected following the loss of child and the couple's diverging paths through grief.
"I read the novel years ago and it stayed with me-profound, lovely and very moving", Cumberbatch said. With the passage of time, a balance of sorts returns, until hope surfaces and triumphs unexpectedly.
Piers Wenger, Controller, BBC Drama Commissioning, added: 'The Child In Time is a unique and moving story and one which I think will touch the heart of every BBC One viewer.
It's a little too early to know a precise premiere date just yet for "The Child in Time" as a TV project, but we will share more news once we've got it.
Benedict Cumberbatch has already developed a strong relationship with both the BBC and Masterpiece on account of his successful, four season run as the titular Sherlock, a role he's played since 2010 - and a role that, critics say, catapulted him into the American pop culture zeitgeist and turned him into the "Thinking Woman's Crumpet".
Naturally, Benedict Cumberbatch released a statement about his participation in the made-for-TV film, which we encourage you to read in his delicious accent. "I have fond memories of Benedict playing a brilliant and key part in the movie adaptation of 'Atonement.' Now, it's a great honor to have this actor of such huge resource, experience and subtlety in the lead role of 'The Child in Time'".