The Cosby Show (1984)

S3E9 Denise Gets a D

Denise begins her college journey on a shaky note with a D grade, but she's too afraid to share the news with her parents. Meanwhile, Clair is stuck in bed dealing with a pinched nerve. Rudy takes on the role of "the wind" in her school play. Rosalind Cash guest stars as Dr. Hughes. (The episode opens with a brief 30-second public service announcement against drug use featuring Bill Cosby.)