<Li> Sheldon Leonard as Dr. Wexler ("Physician of the Year," season 1) </Li> <Li> Nancy Lieberman as Opponent #1 ("The Boys of Winter", season 5) </Li> <Li> Miriam Makeba as herself ("Olivia Comes Out of the Closet", season 8) </Li> <Li> S. Epatha Merkerson as Book Club Member 5 ("Bookworm", season 4) </Li>

When did sandra come on the cosby show