I was lucky enough to have my current research featured on RNZ Nights. From the description:
Not many people know that domestic postal censorship existed - yet from the outbreak of the First World War until November 1920, the private letters of mothers, lovers, internees and workmates were subject to a strict censorship. A team of diligent readers in post offices around the country poured over 1.2 million letters. In some cases, people were arrested and deported because of their private thoughts, or mail was used to hunt down objectors hiding in the bush.You can check out the feature here, or listen below:
There's also a partial transcript on the site.