hear no evil, speak no evil" proverb, which is traditionally illustrated with a trio of monkeys. It's in the first few ...

and often there are ominous-looking monkey statues, etc. In episode 1, eagle-eyed fans noticed that the three Ratliff ...

The Devil comes out of Dante's Inferno, hoping to get the See No Evil, Speak No Evil and Hear No Evil monkeys to his side, but a bunch of literary characters come to the rescue of the monkeys.