Al-Jazeera trial: 'Our son is entirely innocent'
20 February 2014 Last updated at 09:34 GMT
Twenty journalists, including four foreigners, are to go on trial in the Egyptian capital, Cairo.
Lois and Juris Greste told the BBC that their son Peter is "entirely and completely innocent".
The journalists face charges including joining and aiding a terrorist organisation, and endangering national security.