Remembering Matthew Perry: His Final Days, Rare Moments From Friends and More

'Friends' star Matthew Perry died at the age of 54 on Saturday. ET was on the scene in the moments after his death, and now opens the vault to showcase rare interviews, never-before-seen moments and heartfelt stories from Perry's past. Plus, co-stars pay tribute; new interviews with Yvette Nicole Brown, Morgan Fairchild and others who knew him best.