Board Thread:General Grimm Discussion/@comment-209.165.254.251-20170102214454/@comment-33528609-20180531055826

That part of the grimm gene kicking in when one is dying or whatever seemed to be retconned out of the show. after the pilot episode. They never referred to it for the 122 of the remaining episodes after that. The writers implied that everyone was alive and well after that last scene of the show. It's very probable the "Dad" referred to by Diana is the same one who always went out hunting bad wesen but instead of doing so with Monroe and Rosalee, it was with the triplets.