Take a look back at some of the more memorable casting changes in the history of television.
After Duchovny's semi-departure, the show introduced two new central characters, FBI agents John Doggett (Robert Patrick) and Monica Reyes (Annabeth Gish), to join Gillian Anderson's Dana Scully.
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Philip Andrews / Reuters
Keystone Resort/Ben Lindbloom
SRI International via Wikimedia Commons
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