The 100 spinoff may still be "very much alive" at The CW, but the series has yet to progress even further, said CEO Mark Pedowitz.
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The 100' Prequel Series Not Moving Forward at The CW - mxdwn Television
The 100″ Prequel Spinoff Cancelled at The CW, Not Moving Forward – TVLine
The 100 (TV series) - Wikipedia
The 100 spin-off gets status update at The CW
The 100″ Prequel Spinoff Cancelled at The CW, Not Moving Forward – TVLine
The 100 prequel still in works, confirms CW head Mark Pedowitz