Donnie goes missing and the rest of the Thornberry family have various adventures (broken bones, getting lost in a cave, and a forest fire) while looking for him. It has been screened as a TV movie and as four episodes in season 4 of the TV series.
Travel the world with the Thornberrys and come face-to-face with blue sheep in Nepal, emus in Australia, marmots in Pakistan, flash floods in Siberia, Egyptian burial chambers, a runaway hot air balloon, a rock slide on the Karakoram Highway and more!
