Des is the terrifying new ITV drama that depicts the evil killing spree of serial murderer Dennis Nilsen. David Tennant plays Nilsen, who confessed to murdering at least 15 boys and young men in the late seventies and early eighties.
Tonight the new show will explore how this horrifying tale unfolded, with the discovery of human flesh in Nilsen's drains at his London home.
The star-studded cast includes the former Doctor Who star in the title role, as well as Daniel Mays as Detective Chief Inspector Peter Jay and Jason Watkins as the killer's biographer Brian Masters.
Here we take a look at what the Des cast looks like in real life. David Tennant as Dennis Nilsen David Tennnat takes on the title role of serial killer Dennis Nilsen.
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