- Somehow, Snape shows up.
- He threatens to blow Sirius' head off with his wand, but then decides he'll turn him in to the Dementors…which is a fate worse than death.
- Harry uses expelliarmus on Snape, knocking him into a bed. Goodnight, Snape.
- Sirius reveals that Scabbers the rat is Peter Pettigrew, who has shapeshifted into a rat.
- After prying the rat from Ron's grip, Sirius casts a spell, changing Pettigrew back into a man. A very ratty looking man. And we're grateful that his clothes transform with him.
- Pettigrew is begging them for mercy.
- Harry says they should spare Pettigrew's life.
- He decides they should take him to the castle where the Dementors can have him. That might be a fate worse than being eaten by a cat.