Idris Elba in "Luther"

Idris Elba in “Luther”

*Fans of the award winning BBC drama “Luther” found out Thursday that Idris Elba will return to the role for one night only.

BBC America tweeted that Elba reprises his role as London police detective John Luther for a three-hour movie special to premiere on Dec. 17 (9-11 pm ET).

The plot is described as Luther’s epiphany: He can’t walk away, much as he would like to leave the darker side of humanity behind, according to the BBC America press release.

His chance for a normal life is thrown off when he’s drawn into a case involving a cannibalistic serial killer who “delivers a devastating blow that not only pulls him out of seclusion but pushes him closer to the edge than he’s ever been.”

Still, he’s drawn back to the fray, lured by the gruesome clues left by a body-part-munching killer. But Luther’s demons continue to stalk him, not to mention the ghosts from his past. Isolated and even more volatile, Luther struggles to keep it together.

“I think Luther goes back just because he can’t stay away from it for too long,” says Elba in a statement. “Ultimately, because he’s a protector, (he) just wants to be able to fix what he can see other people won’t be able to …”