These are pieces of soundtrack used in Primeval but not featured in the Primeval Original Television Soundtrack. This is because the pieces released on the Official Soundtrack are all composed by Dominik Scherrer, while these pieces are the work of different composers. However, there are some pieces of Scherrer's soundtrack that have not been released or named. There are also variations of some tracks between episodes and stard/end segments of tracks that were never featured.