A wild theory claims that one of Friends' creepiest characters made a sneaky but disturbing return in Joey: Chandler's former roommate, Eddie.

As Friends grew ever more popular over the years, more and more guest stars appeared in cameos or even across multiple episodes.

The official 'Friends' YouTube channel posted the first two episodes of 'Joey,' the 2004 spinoff series following Matt LeBlanc's Joey Tribbiani.