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TGIF Then & Now

26 of 73

NOW: Christopher Castile

Christopher Castile retired from acting in 1998 when "Step by Step" was canceled. He currently works as a Political Science professor at Biola University in Canada. —XFINITY Entertainment Staff (Photo: Christopher Castile's Twitter)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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