Plot summary
Olivia handles a case for a former friend from law school, Catherine, when her daughter goes missing and is later found dead, leaving Olivia suspicious about Catherine. Fitz struggles with his work towards gun control when Elizabeth works against him. Elizabeth tries to stop the process by bribing a judge and having Michael sleep with Cyrus. Meanwhile, Mellie becomes overly invested in a national case in which a man is allegedly pushed by his wife off the cliff of Yosemite National Park, and tries with no success to get the FBI to believe the wife is innocent.
Abby tries to handle the situation about Mellie, but Fitz gets in her way. Jake continues his investigation into who killed Harrison and Adnan, involving Quinn to talk to Charlie. He figures out that Rowan was responsible for the deaths. David blackmails the swing judge in the gun control case to win, but feels terrible when the judge commits suicide.
Credits
Adapted from Wikipedia contributors, Scandal season 4. HTML formatting and reference markers removed.