Overview

• The episode aired Sunday, 28 September 2025 on Das Erste and is streaming in the ARD‑Mediathek.
• The plot centers on a cyberattack at fictional firm Lauber Cardio that manipulates implantable defibrillators, putting about 2,400 patients at risk.
• The extortionists demand 317 million Swiss francs for a digital key, with a musical clue tied to composer Léo Delibes woven into the case.
• Investigators Tessa Ott and Isabelle Grandjean race the clock under personal pressure as Ott worries about her mother, who relies on an implant.
• Critics praise the provocative premise and technical puzzle pieces yet fault formulaic dialogue, overstuffed themes and an unusually high on‑screen death toll.