The Assassination of Gianni Versace: Ryan Murphy says he knew Darren Criss was 'capable of great darkness'

Cover your eyes, Gleeks.

Darren Criss, who played squeaky clean, bow-tie aficionado Blaine Anderson on FoxsGleeis about to shed that image.

Portraying the sociopath, Criss vacillates between being charming, pathetic, ruthless, and psychotic.

I did as much research as humanly possible, says Criss.

But, theres not a whole lot of preparation it’s possible for you to do.

At any point, hes ready to fire off in any direction.

I just knew he could do it, reveals Murphy.

More than that, I knew that he was super hungry and ambitious.

I think people thought of Darren as a musical comedy star first.

But, when I sawHedwig, I knew he was capable of great darkness.

The Assassination of Gianni Versace: American Crime Storypremieres Jan. 17 at 10 p.m. on FX.