<Li> Mozhan Marnò as Wall Street Telegraph reporter Ayla Sayyad . She is assigned to the White House and does freelance investigative reporting . </Li> <Li> Elizabeth Marvel as Heather Dunbar, a lawyer and Solicitor General of the US in the Walker Administration . She runs against Underwood for the Democratic nomination . </Li> <Li> Derek Cecil as Seth Grayson, a political operative who becomes Press Secretary for Vice President Underwood through blackmail . </Li> <Li> Paul Sparks as Thomas Yates, a successful author whom Frank asks to write a book about the America Works jobs program . He stays on as a speech writer and Claire's lover . </Li>

When was season 6 of house of cards filmed