The new style credits arrived on Episode 46. They mark the departure of Rhonda.
After Sarah's death in Episode 50, Wheels takes her place in the credits.
Episode 91 saw a revamp of the credits to include David, Alice, Megan, Toni and Harley as regular characters. They also mark the departure of Wheels.
After Episode 134 the character credits were no longer used, and future episodes saw the credits involving the E Street logo and a few surrounding shots of 'E Street'.