Classic 1940s film-noir teaser trailer, high-contrast black-and-white, deep-focus cinematography. Opening: overhead crane down through cigarette smoke onto a midnight radio studio, a lone host at a ribbon microphone under one hot key light, venetian-blind shadows raking the walls; a smoky solo saxophone over vinyl crackle. Cut to: extreme close-up of the switchboard as a red incoming-call lamp blinks alive and the operator's gloved hand hesitates on the plug; the sax cuts out, leaving only tube hum and a calm voice confessing down the wire. Cut to: the host's face in half-shadow, sweat at his temple, mouthing a name silently while the studio clock behind him ticks one full second backward; a double-bass pulse like a slowing heartbeat. Final shot: the glowing ON AIR lamp reflected in the dark control-room glass gutters and dies as the caller's laugh dissolves into static, camera pushing slowly into the dead bulb; a sharp brass stab, then pure room tone, hard cut to black. High-contrast silver-nitrate monochrome grade with blooming highlights, 35mm film grain, volumetric smoke-cut light shafts, ultra-detailed, smooth prowling camera movement, trailer pacing, no text, no captions, no watermark.