Friends produced more than 200 episodes between 1994 and 2004. With such a large number of episodes, it's inevitable that some would be held in high regard, while others would get lost in the shuffle. Episodes that stand out include "The One Where Ross Finds Out" and "The Last One," because of the cliffhangers and high stakes in their plotlines.
Source:https://www.cbr.com/most-underrated-friends-episodes/