Welcome to Law.com Class Actions: Critical Mass, a weekly briefing for class action and mass tort attorneys.

This week: A federal judge in California on Friday will hear arguments about whether to dismiss lawsuits blaming social media sites like Facebook and TikTok on mental health problems in young users. The first trials since Johnson & Johnson’s talc bankruptcies were dismissed are starting up in California and Washington. Found out who represents Caesars Entertainment in data breach lawsuits.