We follow various terrestrial clades as they make the transition back into aquatic life. 0:00 - Intro 1:15 - Orthorhachids 2:30 - Hadrorhacids 3:28 - Ptilopods 5:33 - Teleopterids 8:39 - Dorypods 9:55 - Temnopods 11:09 - Tanypterids 12:22 - Remipterids 14:30 - Anostracans 15:52 - Trichopods 17:36 - Myzostomes 18:29 - Metaxypods 19:33 - Climate change 21:30 - Semi-aquatic 22:25 - Copetarsans 23:31 - Prenobrachids 24:54 - Trachygnathans 27:02 - Dolichognathans 29:15 - Actatheres 30:48 - Thalattotheres 33:20 - Isopterygians 33:59 - Anisopterygians