Now You Know

Now You Know may refer to:

• "Now You Know" (Desperate Housewives) the premiere episode of Desperate Housewives Season Four
• Now You Know (play) a 1995 play by British playwright Michael Frayn
• Now You Know (Doug Martsch album), a 2002 album released by Doug Martsch of Built to Spill
• Now You Know (Unknown Prophets album), a 2002 album by Unknown Prophets
• Now You Know (film) a 2002 film directed by Jeff Anderson
• "Now You Know", a song by The Afghan Whigs from their 1994 album Gentlemen
• "Now You Know", a song from Stephen Sondheim's musical Merrily We Roll Along
• "Now You Know", a song by The Real Kids.
• "Now You Know", a song by American punk band 2Cents, off their album Dress To Kill
• Now You Know, the longest-running TV show on UGBC-TV at Boston College

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