Stealing the time machine's return pad from his past self while Vinny provides a distraction, Stewie goes back in time and saves Brian's life, at the cost of erasing himself from history. Brian is extremely grateful for being saved, but Stewie of this timeline finds Brian's affections unnerving, not knowing the reason behind them. The episode ends with the family sitting around their Christmas tree with everything back to normal. After "Christmas Guy" aired, Seth MacFarlane tweeted, "you didn't really think we'd kill off Brian, did you? Jesus, we'd have to be fucking high." Brian is featured in a "Family Guy" parody in the "South Park" episode "Cartoon Wars Part I". The scene depicted a conversation between Peter and Brian leading to one of the show's trademark cut-away gags; like Peter, Brian was rendered in the distinct animation style of "South Park". Brian also appeared in one episode of Seth MacFarlene's other animated sitcom, "American Dad!" titled "The People vs. Martin Sugar." When Stan Smith begins to mention his list of "Top 10 Fictitious Dogs," with the last one being Brian, he briefly appears confused asking Stan, "Uh, do I know you?", which is an homage to MacFarlane himself since he voices both characters. Brian was also featured, along with Stewie, in advertisements for Wheat Thins and Cool Whip. He and Stewie also introduced the 2007 Emmy Awards with a song which recapped the events in television, over the past year. The song was adapted from the one sung by Brian, Stewie and Peter in the "Family Guy" episode "PTV". Brian is featured on the "" CD, and also plays a significant part in "Family Guy Video Game!", the first "Family Guy" video game, which was released by Sierra Entertainment in 2006. He (along with Stewie) features at the center of Family Guy's second video game, "". MacFarlane recorded exclusive material of Brian's voice and other "Family Guy" characters for a 2007 pinball machine of the show by Stern Pinball. In 2004, the first series of "Family Guy" toy figurines was released by Mezco Toyz, each member of the Griffin family had their own toy, with the exception of Stewie, of whom two different figures were made. Over the course of two years, four more series of toy figures have been released. As of 2009, six books have been released about the "Family Guy" universe, all published by HarperCollins since 2005.