When does Madam Secretary return?

Madam Secretary ran on CBS from September 21, 2014, to December 8, 2019, for a total of 120 episodes aired. It stars Téa Leoni as Elizabeth McCord, a former CIA analyst and political science professor who is appointed as the United States Secretary of State following the suspicious death of her predecessor. The show also focuses on McCord's personal life and family, and their relationship with her work; she is married and has three children.
The first five seasons of Madam Secretary explore Elizabeth McCord's life as the reluctant but determined United States Secretary of State. At the end of the fifth season, McCord announces her candidacy for President of the United States. As the sixth season begins, the audience learns that she has won the election, and the remainder of the series follows her tenure as the first female president.