SPOILERS:
Harry recalls the dream again, the Gryffindors play Ravenclaw for the final match of the Quidditch season, and Hagrid introduces Harry and Hermione to his half-brother, Grawp, making them promise to look after Grawp if he has to leave. Gryffindor wins the match and the Quidditch Cup, and Ron is carried triumphantly off the pitch.