Harry uses the Pensieve and relives Snape's memories following his death. Snape's memories explain the prophecy and the reason for his actions, such as killing Dumbledore. This experience teaches Harry more about Snape and his own fate.
Sophie answers the question, "what is a computer?" She uses an analogy involving a person at a desk to illustrate how computers process information and discusses the different components in a computer, such as a hard drive, memory, and a processor. She then talks about binary, the language of computers
Mysterious disappearances are occurring all over the planet Mobius, and Sonic sets out to solve the mystery. He tries to create a profile of the criminal based on eyewitness accounts, but it doesn't work out so well.