Watch

NOVA

Season 4, episode 18. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.

Currently watching

S4 E18

Across the Silent Barrier

NOVA explores the different means by which hearing-impaired people have learned to penetrate the world of the hearing by visiting with Kitty O'Neil—a woman record-holding speed car racer; Frances Parsons, an advocate of hearing-impaired persons' rights; and workers at Silent Industries—a factory in Los Angeles founded by a deaf man.

SeasonPrevious episode Next episode

Watch state

Sign in to save resume state and recent activity

Watch history and continue watching stay tied to your active profile, so you can pick up later from browse, account, and detail pages.

Provider validated

Watching via moviesapi

No ads approved

Cast And Share

Open the player on the device you want to cast from

These providers run inside an external iframe, so the most reliable casting flow is to open the player in its own tab and use your browser or device cast controls there.

Open Player

AirPlay, Chromecast, and browser tab casting work best after opening the provider directly

Season 4

Back to series detail

Episode 1: Hitler's Secret Weapon

Episode 2: The Hot Blooded Dinosaurs

Episode 3: What Price Coal?

Episode 4: The Sunspot Mystery

Episode 5: The Plastic Prison

Episode 6: Incident at Brown's Ferry

Episode 7: Bye Bye Blackbird

Episode 8: The Pill for the People

Episode 9: The Gene Engineers