Choose the production before changing inputs
Search Supernova on a phone, tablet or computer. Open the right year and season, then check viewing options for your country. That tells you which service to open on the television.
Use the supported TV app
When available, the viewing service's native television app is usually the clearest place to choose audio, subtitles and picture quality. A TV web browser may have different controls and limitations. Casting also depends on support from the service and receiving device.
Test the final screen
Before everyone sits down, confirm that you can find the title, read the subtitles and use the remote to pause. Check that the correct account or edition is selected on the television, not just on your phone.
Consoles and streaming sticks can be useful when they offer the required service app. They do not guarantee every viewing feature simply because they connect to the same screen. See picture quality for the difference between the screen's capability and the edition actually being delivered.