Iron Curtain is the tenth episode of The Wild Thornberrys's first season which was first broadcast on October 6, 1998.
When the Thornberrys need some close-up footage of elephants, they travel to the Ngorongoro Game Preserve after Eliza is nearly trampled by an elephant. At first Eliza believes it to be a prison, and helps a baby elephant escape to find her mom.
She quickly changes her mind about the place when they tackle with some poachers out to trap and kill her pachiderm pals. Meanwhile, Debbie loses Donnie and has to find him before he gets sent off to a university as "the missing link"