 The original (unaired) pilot episode was shot with a different cast.  Elizabeth Lackey (qv) was the first to assume the role of Lt.  Jamie Avery, Azura Skye (qv) played Karen Kawalksi and rock  musician Meat Loaf (qv), was barman Digger. The only "survivors"  from that shoot were Dominic Purcell (qv), and,  John Marshall Jones (qv).