In a scene from Season 3 of “ Alone Australia,” Ceilidh, a young deaf woman, looks up at a bird on a tree limb far above and remarks that it is a white-bellied sea eagle. She adds that her father had a tattoo of the bird on his arm, and goes on to explain that he was her greatest champion, but died of leukemia when she was a teenager. After a pause, she says, “It’s like my dad is watching over me.” It’s a scene that encapsulates the emotional appeal of the show, in which 10 survivalists compete