The company, Gold Apollo, said it had not manufactured the devices, pointing to another company that it said was licensed to use its brand.

© Lam Yik Fei for The New York Times

Some think the drama, “Zero Day,” helps Taiwan confront an increasingly plausible scenario. Others say the show is alarmist and a tool of the government.

China is putting more military and political pressure on Taiwan and its new president, whose rhetoric has been sharper than his predecessor’s.

The authorities in Taipei have demanded that Beijing release the boat and its five crew members, who are being held in custody.