Season 8 opener, forensics guy being rechecked, case reinvestigated at a museum.
This is a solid opener with a solid case and good character interaction. The case is somewhat predictable, but still fun to follow, and seeing lots of fossils at a museum adds atmosphere. There's less outside of work stuff here than otherwise, but character interactions are still fun.
Season 8 as a whole is my favorite season, ironically since the actors were getting bored from what I have read and would start leaving over the next few seasons. It combines the great character interactions of the original team with some excellent, intense cases involving various subcultures and situations, combining the best parts of later and earlier seasons well. Old Fossils starts the series off well, with later episodes of even better quality.