David Tennant is Super Creepy in the Trailer for Serial Killer Drama 'Des'

Though mega-popular actor David Tennant has played a variety of roles over the years - the Tenth Doctor on Doctor Who, a detective with plenty of baggage of his own on Broadchurch, a half-hearted demon in Good Omens, even a Marvel supervillain in Jessica Jones - it's still a bit difficult to see him as a bad guy. We want to believe that Tennant is as awesome a person as he generally seems to be, which is why things like his role as a family murdering doctor in Deadwater Fell feel so incredibly jarring to watch. And it's why it's going to be so incredibly uncomfortable to watch his upcoming role as one of the U.K.'s most notorious serial killers.

I mean, I guess that's why they call it acting and all. But still.

Tennant will play Dennis Nilsen, a Scottish serial killer, and necrophile who killed at least 12 boys and young men in his flat from 1978 to 1983. But because his deadly activities went undetected for so long, and because he primarily targeted homeless people, runaways, and those who had otherwise slipped through the grid of larger British society, that number is uncertain and is likely to be at least 15.