Season five of Friends opens just a few moments after the wedding of Ross (David Schwimmer) and Emily (Helen Baxendale), in which Ross all but sealed the doom for the union by invoking the name of Rachel (Jennifer Aniston) during the exchange of vows. It is also a scant few hours after Chandler (Matthew Perry) and Monica (Courteney Cox) have slept together for the first time. The latter couple tries to keep their romance a secret, but by mid-season everyone knows the truth. In later plot developments, the newly divorced Ross briefly moves in with Chandler and Joey; and surrogate mother Phoebe (Lisa Kudrow) gives birth to triplets. In the now-famous season-five finale, Joey heads to Las Vegas for a juicy film role, and is eventually joined by the rest of his friends. Caught up in the glamour and glitter of Sin City, Monica and Chandler briefly consider a quickie Vegas marriage...only to find out that two of the other "friends" have beaten them to it! Friends wrapped up its fifth season on the air as the second most popular network program in America — not to mention its post-Seinfeld status as the country’s top-rated sitcom. ~ Hal Erickson, Rovi