This is the first season of the show. It starts with Will leaving Philidelphia and meeting and settling in with the family. During this season Will meets Jazz(who stays as his friend through out the series). In season 1 we see Will's rebelious behaviour influencing Ashley.
In this season one of the main events we see is Wills mother getting a boyfriend. This shows for the first time that Will cares about his family. During the whole show Ashley is the character that changes this continues in the 2nd season. Ashley gets a boyfriends and acts more mature.
Season three was the last season for Janet Hunert-Whitten. In this season a major event happens with the birth of the Banks youngest child Nicky. At some time during the season all of the Bank children have some type of jealousy towards Nicky. Also in this season Philllip Banks runs for judge but is unsuccesful. This season is the first time that Hilary gets a proper job and starts earning money.
In season 4 Carlton and Will start college and move to their own apartement. Hilary's boyfriend Trevor proposes but while attempting to do a stunt he dies. This makes Hilary depressed for a short period of time. We see Lou Smith( Will's father). Will and Lou reunite but once again Lou dissapoints Will. Uncle Phil has a heart attack and Carlton shows his soft side being to scared to see his father being sick
In this season Phillip invests in a record store when Will realises that Ashley has potential as singer. With great debate Will becomes Ashley's manager. Later Phil decides that Will takes it to seriously and he is 'fires'. Ashley starts to become extremely self-centred and as a result her music careear flops. Will meets a girl called Lisa. At the end of the season as they are about to get married when they decide not to when Will's mom and Lisa's dad say they will get married.
This is the last season of the show. Hilary's prime-time talk show becomes more popular. Ashley becomes older and starts to take adult decisions. Carlton gets into to Princeton University but decides not to go but later changes his mind. In the last episode the Banks prepare to move from California. Carlton goes to Princeton University. Hilary moves to New York when her talk show is moved there. Ashley attends an art school in New York and the two sisters live together. Phillip,Vivian and Nicky move to the east and Will stays in California to continue his studies because he feel that he has not used his time in Bel-Air usefully.