The Best TV Serial Killers

Killer Instincts:  Laurence Todd Rosenthal of Bones

The third of technically four killers to bear the anti-Masonic kneecap-stealing, finger-snapping, toothy serial killer, "The Master" didn't have much in the way of facetime. But he proved one of Seeley and Bones' most compelling cases to date, even if fans cry bloody murder at the reveal of Zack Addy as the apprentice.

Killer Instincts:  Robert Knepper of Prison Break

That old, dirty bastard.  You love him, you hate him.  You made him a regular cast member after only two episodes, and the shadow of T-Bag would continue to loom over the entire series as Bagwell took his intrinsic raping, murdering and pedophilic ways across the country, sometimes completely detached from the main storyline!

Not to mention that the character proved popular enough for a brief appearance on Breakout Kings, as well!

Killer Instincts:  Christopher Meloni of Oz

Initial member of the Aryan Brotherhood and on again/off again love to Tobias Beecher, Keller eventually admits to the murders of young gay men that first landed him in Oz, while find ourselves in deep confusion by alternating watching episodes of Law and Order: SVU.

Killer Instincts:  Frank Silva of Twin Peaks

The ultimate manifestation of evil and body-possessing killer of Twin Peaks, Killer BOB was actually written into the series after an error in filming accidentally caught set-dresser Frank Silva's reflection in a mirror during a dream sequence!