premise: Rachel Green appeared in every episode of Friends until the final episode in 2002.
hypothesis: Rachel Karen Green is a fictional character , one of the six main characters who appeared in the American sitcom Friends . Portrayed by actress Jennifer Aniston , the character was created by show creators David Crane and Marta Kauffman , and appeared in each of the show 's 236 episodes during its decade-long run , from its premiere on September 22 , 1994 to its finale on May 6 , 2004 .