1, get a Disney plus account
2, get a VPN like Nord
3, connect to new Zealand
4, close and re open Disney plus (force stop the app if on tv or fire stick or something similar)
5, enjoy
Boom enjoy (new Zealand disney plus has all the king of the hill eps available on there)
EDIT: I know it’s not a massive breakthrough but I see a lot of people mentioning king of the hill not being in UK among other countries, I’ve tested this on my end (UK) and can confirm it works with nord vpn