Miller tracks down Anderson Dawes (Jared Harris), the charismatic and mysterious OPA leader on Ceres, who denies all knowledge of Julie and her being on board the Scopuli. Reminder: The Outer Planets Alliance, or OPA, is a unsanctioned political group fighting for Belter rights.
Back on Earth, Chrisjen Avasarala manipulates her old friend and colleague, Franklin DeGraaf, the U.N. Ambassador to Mars, to raise alarm bells with the Martian government that prompts them to check their arms facilities. She lies to him that intel indicates the stealth ships that blew up the Canterbury came from Mars. She has Frank monitored.
When Frank's calls to Mars indicate that he was inquiring about stealth ships/stealth tech - and reports are that nothing is missing - Avasarala is convinced Mars is innocent in the Canterbury's destruction. After all, if Mars was guilty, why would they secretly check if their stealth was missing?