November 10, 2004: Michael proposes to his girlfriend, Rosie, after spinning the Big Wheel in the Showcase Showdown. And while everyone's still in shock, he hits a dollar! Even Barker can't believe it.
September 4, 2012: On the 40th-Anniversary Special, contestants who won prizes years ago returned for another chance to win. One woman who returned told the story of how she came onto the show the first time: she had gone through a divorce and became homeless. She didn't get a ticket to appear on the show at first, but she sat in front of the studio and managed to get in. She won $12,500 in Plinko, $1,000 more on the Big Wheel, and finally the Showcase for a total of $48,578. She wasn't homeless anymore after that.
December 12, 2013: Almost all of the episode celebrating Bob Barker's 90th birthday. He entered to the sound of an excited crowed, called a contestant to "come on down," presented one of the Showcases (to the contestant he called on down, no less), and at the end, he and Drew did the "have your pet spayed or neutered" plug together.
Say what you will about the 2012 revival of the Australian Price, but Larry Emdur's tribute to Ian Turpie (host of the 1981-86 and 1989 versions), who passed away a few weeks before this version began production, on the premiere was pure class.