In the US you can watch it on the CW on sundays (8pm).
And you can watch the episodes one day later on the CW App (but please ...not... on a mobile
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If you don't live in the US, you can't use the above options (legally).
You can wait for an airing on a network in your country....which might take pretty long in a country, when english isn't the first language.
Or you find other ...options.
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Or you wait for the whole season to be available on Blu-ray/DVD or on streaming.
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As I am really, really, really eagerly awaiting the TV show, I will watch the episodes on mondays. I can't watch them on sundays, due to time difference it would be 2AM on monday here....
I intend to watch the episode from last week for a 2nd time just before I watch the newest episode on monday.
And, of course, I will buy the whole season on Blu-ray as they are available.
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How about you? How and when will you watch the episodes?