Complex sentence: Due to Duchovny's limited schedule, some scenes featuring Mulder were filmed using different people; for instance, the scene of Mulder's exhumation was filmed with a double wearing a mask of David Duchovny's head.
Split into simpler sentences: Due to Duchovny's limited schedule, some scenes featuring Mulder were filmed using different people. For instance, the scene of Mulder's exhumation was filmed with a double wearing a mask of David Duchovny's head.