Joanna Lumley joins the Kenya Wildlife Service to catch a herd of endangered giraffes.
Tamzin Outhwaite travels to the Bahamas and Florida to swim with dolphins.
Amanda Burton forms part of a team to rescue orphaned black bear cubs from certain death.
Martin Clunes assists a team in the release of a 26-year-old elephant.
Nicholas Lyndhurst travels to Africa to help chimpanzees return to their natural habitat.