Sheldon the Evil Turtle cuts the head off Stewie's teddy bear Rupert and sends it to Stewie in a box. Later in the episode we see Rupert all in one piece again in Stewie's crib, with no suggestion he's had his head cut off and then sewn back on again. See more
[Super Mario has saved Stewie from Sheldon
Super Mario? What are you doing here?
I jump on the turtles, Stewie. It is not much of a life, but it is my life.