Following the release of the Dinosaurs: The Complete First and Second Seasons DVD box set in 2006, Buena Vista Home Entertainment released Dinosaurs: The Complete Third and Fourth Seasons in a 4-disc DVD set in 2007. The set includes the final 36 episodes of Dinosaurs along with bonus features. Only seven of the fourteen episodes from Season 4 aired on ABC during the show's original run. ABC's run aired the final episode, "Changing Nature", as a definitive finale to the series, but left seven episodes unaired. Those extra seven episodes aired later in syndication.