In The Big Bang Theory season 1, the characters have various goals that evolve throughout the series. Sheldon's lifelong goal is to win a Nobel Prize, which he does in the series finale.

Howard’s Big Bang Theory character development was always one of the show’s more impressive character arcs, as season 1’s sleaze became a loving family man by the finale. However ...

When The Big Bang Theory first aired in 2007, Penny rapidly became a central cast member of the sitcom. Although her inclusion helped balance the social awkwardness of the group with attractiveness ...