Hi Peter,
Whilst waiting for some processing, I looked into this issue.
https://www.tvnz.co.nz/shows/hillary/episodes/s2014-e1
All Eps are here, though it's geoblocked. I ran through a proxy, and got *mostly* through that, to which it demanded a NZTV.co account be set up. I did this. You need to use the "token URL" method to confirm the membership (2nd option), rather than checking your email/clicking the link.
The proxy method is messy, and I don't suggest it. A VPN service, using a "1st month free" offer, is probably your best bet. Remember to set New Zealand as the server, in this instance.
From that point, you can watch it live, or use a Youtube downloader browser extension to keep it.
I need to do this stuff every week for work, though ironically, I watch zero TV myself. I hope this helps you somehow.
Cheer, Andy.