<Tr> <Td_colspan="2"> ← Previous Season 3 </Td> </Tr> <Tr> <Td_colspan="2"> List of Madam Secretary episodes </Td> </Tr> <P> The fourth season of the American political drama series Madam Secretary premiered on October 8, 2017, on CBS in the United States . It is produced by CBS Television Studios, and Revelations Entertainment with series creator Barbara Hall serving as executive producer, alongside Morgan Freeman, Lori McCreary, and Tracy Mercer . </P> <Ul> <Li> Téa Leoni as Dr. Elizabeth McCord, the United States Secretary of State </Li> <Li> Tim Daly as Dr. Henry McCord, Elizabeth's husband and a National Security Agency operative </Li> <Li> Keith Carradine as Conrad Dalton, President of the United States </Li> <Li> Erich Bergen as Blake Moran, Elizabeth's personal assistant </Li> <Li> Patina Miller as Daisy Grant, Elizabeth's press coordinator </Li> <Li> Geoffrey Arend as Matt Mahoney, Elizabeth's speechwriter </Li> <Li> Sebastian Arcelus as Jay Whitman, Elizabeth's policy advisor and later chief of staff </Li> <Li> Sara Ramirez as Kat Sandoval, Elizabeth's new policy advisor </Li> <Li> Kathrine Herzer as Alison McCord, Elizabeth and Henry's younger daughter </Li> <Li> Evan Roe as Jason McCord, Elizabeth and Henry's son </Li> <Li> Wallis Currie - Wood as Stephanie "Stevie" McCord, Elizabeth and Henry's older daughter; later, Dmitri's girlfriend </Li> <Li> Željko Ivanek as Russell Jackson, White House Chief of Staff </Li> <Li> Chris Petrovski as Dmitri Petrov, a former Russian spy who joins the National Security Agency to work for Henry </Li> <Li> Bebe Neuwirth as Nadine Tolliver, Elizabeth's chief of staff </Li> </Ul>

When did season 4 of madam secretary start