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.