Agrega una trama en tu idiomaThe cast of '30 Rock' reunites for this TV special announcing NBCUniversal's 2020-21 television season.The cast of '30 Rock' reunites for this TV special announcing NBCUniversal's 2020-21 television season.The cast of '30 Rock' reunites for this TV special announcing NBCUniversal's 2020-21 television season.