Season 4 Episodes 23 & 24 Despite the fact that she was pretty much screwed by the writing of the show, as a necessary victim in the long-running tale of Ross and Rachel, Helen Baxendale's Emily was another great guest star. Frankly though, she got in the way of the show's most enduring love story, so sooner or later she had to go. And rather than simply having her evaporate into the background like yet another love interest, the writers came up with the ingenious idea of ripping her heart to shreds for the sake of Ross revealing (accidentally) who he really loved. That "...take thee Rachel" is probably the single most memorable line outside of the finale of season 10 and the shock-waves were massive. Though season 4's ratings had dipped a little, the moment was enough to pull in more than 30m for the back-to-back finale.
