One day after the taping, Oprah figures out a way to make a Daily Show appearance sooner than later. Oprah calls Jon to offer to fly his entire audience to his Rally to Restore Sanity in Washington DC. "This is crazy what you're doing," Jon says. "It's such a lovely thing you're doing, it's very kind. It's unbelievable."

Watch Jon and Oprah plot the surprise. 

"And if there's ever anywhere that I can ever send your audiences, please," Jon says. "There are those little casino buses. I can send them over. It will be great."

Watch Oprah surprise The Daily Show audience 

Meanwhile, senior supervising producer Lisa and her team are scouting the perfect location for Oprah and Gayle to camp at Yosemite National Park. Check in on their progress.