I subscribed to the Britbox channel on the Apple TV. I've watched the first two seasons of my show, but now it wants me to download the Britbox App and subscribe again to view the remaining seasons.

Hey there byronavory,

Thanks for reaching out to the Apple Support Communities. We understand you're getting a notification to download and subscribe to the BritBox app when trying to watch a specific Doctor Who episode on your Apple TV, and we'd be happy to get you pointed in the right direction.

To get started, we were able to locate some information on BritBox's support site that does state content on the BritBox app is almost identical to what you may find on the Apple TV channel; however, there may be a short delay before a episode becomes available.

You can find this information listed in this link here: Why aren't all the shows on BritBox.com available via Amazon or Apple TV Channels? - BritBox

Since this isn't a live event, the best option would be to reach out to BritBox's support for more information. You can submit a support request using this link here: Submit a request - BritBox

We hope that's able to help.

Take care!