In "Stewie Griffin: The Untold Story", Stewie traveled to a future where he learned that Brian died. Brian is seen in heaven at a table drinking martinis with Vincent van Gogh, Kurt Cobain, and Ernest Hemingway. They then all say that they killed themselves out of passion for various reasons. He then admits that he ate some chocolate out of the trash can.
One Brian from an alternate future arrived with its throat cut to cross paths with a multitude of other Brian and Stewies in "Back to the Pilot".
An "unlucky" Brian leaped to his death from a balcony at the Vegas Star Hotel as part of a suicide pact with Stewie to avoid an enforcer for a loan shark in "Roads to Vegas". Stewie however, reconsidered and failed to leap as well.
Brian is hit by a car and killed in "Life of Brian. The family decides to move on with their lives and buys a new dog, Vinny.
This is the last time brian dies and he is gone for good but there is still hope! We can get rid of Vinny and bring Brian back! We don't need stewie's time machine, we can ask the reaper Peter Griffin meets sometimes to bring brian back. If you Agree please help this petition overthrow Seth MacFarlane to bring Brian Back!