On Valentine's Day, a surprise marriage proposal goes awry with dangerous consequences. Athena attempts to help a desperate woman and unintentionally joins the Lonely Hearts Club. Bobby and Chimney pull holiday duty and learn about the "Casanova Fracture" and Abby and Buck go on their first official date.
- Angela Bassett as Athena Grant
- Peter Krause as Bobby Nash
- Oliver Stark as Evan Buckley
- Aisha Hinds as Henrietta Wilson
- Kenneth Choi as Howie Han
- Rockmond Dunbar as Michael Grant (credit only)
- Connie Britton as Abigail Clark