Because no one has ever had one[1].
There was no industrial revolution in China or India or the Muslim world who arguably were more advanced than medieval Europe.
There was no industrial revolution in Rome or the Hellenistic era who had vastly more potential in the creation and exchange of ideas than the medieval period.
There were no industrial revolutions among the new world civilizations who had larger populations than any medieval nation. There were no industrial revolutions in sub Sarahan African even though there was iron working and abundant resources.
Quite possibly the industrial revolution was actually an improbable set of circumstance and people for which ad hoc but inadequate explanations abound.
(and so there hasn't been an industrial revolution on that tv show because it is unrealistically unlikely.)
[1]With one exception, the one we happen to live in.