With the above, an average viewer can watch free broadcast content with high quality picture and still potentially save money compared to average pay-TV subscription service.

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With eight series between them (both Berlanti and Rhimes have more than one), the cadre of ABC show-runners--someone that serves as both a writer and executive producer on a show--rounded out the most recent broadcast season with average audiences between 7.2 million and 17.3 million, according to Nielsen Media Research.

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They now calculate average concurrent viewers, peak concurrent viewers and total broadcast time for every stream.

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