May 8, 2013 8:28 am Finale Preview: “Grimm” Silas Weir Mitchell, David Giuntoli, and Bree Turner reveal cast members death on this seasons last episode of Grimm. The finale will air on NBC, May 21. US & World Videos 1:07 Britney Spears spotted as authorities respond to alleged hotel incident 2:15 Prince William and Kate Middleton ‘going through hell,' friend claims (report) 8:01 Lady Gaga's outfit changes, Rihanna's bold looks and more iconic Met Gala moments 2:48 Taylor Swift fans react to Jake Gyllenhaal and Sabrina Carpenter's ‘SNL' appearance 5:57 Why your monthly horoscope for May is looking lucky