And yet, there was one kill — one final murder in The Penguin Series Finale, Episode 8 “A Great or Little Thing” — that seemed absolutely beyond the pale. A moment where Oswald Cobb completely shed himself of all vestiges of humanity and truly transformed into a Batman villain.

"The Penguin" finale finds Colin Farrell's gangster ascending to power in Gotham City and losing "any semblance of decency" he had left, Farrell says.

Farrell also breaks down Oz Cobb's season finale choices, his method acting to stay in character and his 'The Batman Part II' future: "I do believe I know him better than anyone now."