“Murder at 10,000 Meters, File 1” - S1.E15

Hajime, Miyuki, Inspector Kenmochi, and Superintendent Akechi are on JAM flight 377, despite the terrorist threat received right before takeoff. They're getting closer to home when smoke suddenly fills the plane from the rear and the passengers panic, thinking it's terrorism. But things aren't what they appear as Hajime and Akechi soon find themselves trying to solve a locked-room murder case 10,000 meters in the air!