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.
Lacey Chabert
as Eliza Thornberry (voice)
Jodi Carlisle
as Marianne Thornberry (voice)
Tim Curry
as Nigel Thornberry (voice)
Flea
as Donald 'Donnie' Michael Thornberry (voice)
Danielle Harris
as Debbie Thornberry (voice)
Tom Kane
as Darwin (voice)
Betty White
as Grandma Sophie (voice)
Alan Henry Brown
as Sri Mayasandra (voice)
Arthur Burghardt
as Rhino / Monkey (voice)
Cara DeLizia
as Baru / Monkey (voice)
Moira Quirk
as Rehabilitation Worker / Monkey (voice)
Dwight Schultz
as Badouk / Monkey / Poacher (voice)
