The season one consists of weird hair cuts and other stuff.
MAIN HEADLINERS:
*The whole monkey thing:
Ross gets a monkey from a fellow college who rescues "Marcel" from a lab. They become very good friends until Marcel starts humping everything in sight and a doctor decides the best thing to do is to give him up to a zoo. "How do you get a monkey into a zoo?" Joey asks. "I know that one" Chandler quips, "Oh no, that's popes into a folkswagon." Finally the San Diego Zoo accepted him and eventually they get reunited in the second season.
*Rachel and Barry fiesco:
Rachel was supposed to marry Barry the Mr potatohead but Rachel does not love him so that's it. Later in the series Barry suddenly decides that he still loves her. He barges into a slightly romantic minute shared between Ross and Rachel. Again, Ross had missed his chance. After Barry asked Rachel on a date (again) Rachel decides that he is still the jerk that he was. She ends up dumping him. (again)
*Ross and his pregnant wife:
Ross got the news that Carol the lesbian got pregnant after Ross had moved out of her apartment. They go to a lamaze class and bingo. In the last episodes of the season, Carol gives birth to beautiful Ben.
That's the lowdown of the First season.