In the Executive Residence, Frank tries to dissuade Cathy from testifying before the committee. Frank then pushes her down a flight of stairs and calls for help, claiming she's fallen. Cathy is hospitalized and thus prevented from testifying. Frank holds a press conference in the Oval Office regarding the Syrian gas bombings. However, reporters ask him about the growing possibility of impeachment. Frank is informed that Hammerschmidt is investigating Zoe's death and believes that it was not an accident. This prompts Frank to throw Doug under the bus. The next night, Claire and Frank hold a dinner for Doug, where they try to convince him to take the blame for Zoe's murder. Though initially off-put, Doug goes to LeAnn and "confesses" to the murder, though she doesn't believe him. It is revealed that Doug is in possession of the birthday cards to Hammerschmidt. Claire discovers that Tom has been continuing his manuscript, which includes her confessions about the deaths of Zoe and Peter Russo. She goes to visit Tom, who blackmails her. Claire and Tom have sex, but he suddenly dies from poison he ingested at the hands of Claire. LeAnn and Nathan Green give their testimony. Frank, watching, debates whether he should testify as well. While he is urged not to, Frank goes to the committee and does so. Frank claims to have done nothing wrong, but claims to respect the office of the presidency too much to allow the investigation to go on. As a result, he announces he will resign the following day.