Brian and Stewie discover Miley Cyrus's horrible secret while Chris captures the Evil Monkey who lives in his closet, who turns out not to be so evil.

!!"Hannah Banana" contains examples of:

* HangingByTheFingers: The Evil Monkey when kidnapped by Miley in a King Kong-like scene, until he falls.
* HiddenDepths: The Evil Monkey isn't so evil, and he even helps Chris with his homework.
* RoboticReveal: Miley Cyrus turns out to be a robot.
* TooDumbToLive: Chris asks Peter to put his head between two restrained logs to get a free hat. He does it.