This week, Linden and Holder closed the Rosie Larsen case, Richmond set out on a bold new path, and the Larsen family gained some closure. You can learn more by checking out the following online extras for Part 2 of the two-part season finale, "What I Know":

• Ten production stills of Part 2 of the season finale

• An "Inside The Killing" video that takes you behind the scenes of Part 2 of the season finale

• A video of one of the most talked-about scenes from Part 2 of the season finale (CONTAINS SPOILERS)

• A video of another one of the most talked-about scenes from Part 2 of the season finale (CONTAINS SPOILERS)

• The Ultimate Fan Game for Part 2 of the season finale

• An open thread for this episode in The Killing Talk Forum (Chat with fellow fans)

Also worthy of your attention:

• Rosie Larsen interactive case file

• Rosie Larsen virtual interactive room

• How Would You Be Cast in a Crime Thriller? personality quiz

• The Killing Crime Sheet, a weekly newsletter for the show

• The Killing on Facebook

• The Killing on Twitter