Complex sentence: Garrett graduated from the National Institute of Dramatic Art in 1970, and after guest roles in police dramas "Homicide" and "Matlock Police" was a member of the original cast of "Number 96" when it began in March 1972.
Split into simpler sentences: Garrett graduated from the National Institute of Dramatic Art in 1970. She was a member of the original cast of "Number 96" when it began in March 1972.