The sixth season of Friends, an American sitcom created by David Crane and Marta Kauffman, premiered on NBC on September 23, 1999.
In Vegas, Ross and Rachel initially have no memory of getting married the previous night, then must deal with the aftermath of their drunken escapade.
She becomes angry when Joey sleeps most of the way rather than playing his promised fun road trip games; he further unnerves Phoebe by picking up a hitchhiker while she was napping.
Back at home, Monica and Chandler ponder the idea of marriage and decide to take their relationship forward a step by living together.
The season ends with Chandler and Monica dancing to "Wonderful Tonight" by Eric Clapton and the screen fades to black.