Alpha is a female Saltasaurus, and the central character in final episode of Dinosaur Planet, Alpha's Egg. Her early life to adulthood is followed in this episode. She is nearly killed by various predators, such as her arch rival Dragonfly, his mate and family, various Notosuchus and Alvarezsaurus, and a pair of Carcharodontosaurus, but manages to escape these brushes with death. She is fifteen years old by the end of the episode, and according to the narrator, she will live until she is over a hundred years old.