 Complete the following phrase:  During the December 2009 filming, on-set rumors indicated that the show could begin filming its regular series episodes within a matter of weeks, pending network approval. At the January 2010 Television Critics Association Press Tour, NBCs Angela Bromstad and Jeff Gaspin said that the pilot would be reviewed by executives and that Rex could become either a fast-track program airing in Spring 2010 to help cover NBCs scheduling nightmare regarding the 