WHO: Harry, his parents, and Sirius, whom he doesn't know is there yet, and, well...anyone else in the apartments, lol..
WHAT: Coming to talk about Peter
WHERE: Leaving apartment 10 and going to apartment 9
WHEN: Later in the afternoon that they find Sirius and bring him home
RATING: It's usually PG in the Potterverse (unless Ginny is there, rrowr..)
( He was old enough for a serius heart attack now.. )