On March 8, 2014, Malaysia Airlines Flight 370 vanished from radar with 228 people aboard and has never been recovered. This episode of the aviation series What Went Wrong reconstructs the flight's last known movements, the sudden loss of transponder contact, and the puzzling turn away from its Beijing route toward the southern Indian Ocean. Aviation experts, air traffic control specialists, and investigators lay out competing theories on camera: a deliberate act by the pilot, a fire triggered by lithium battery cargo, a catastrophic mechanical failure, or a breakdown in coordination between military and civilian radar operators. The film also covers the multi-year, multi-million-dollar search effort led by Malaysia and Australia, the debris later found on Indian Ocean shorelines, and what that wreckage could and couldn't prove. Rather than settling on one explanation, the program lays the leading theories side by side and lets the experts disagree on camera, leaving the disappearance as unresolved on screen as it remains in fact.