Mission Hindenburg

Never turn your back on the Cahills...The most powerful family history has ever known returns with a vengeance in The 39 Clues: Doublecross! The Cahills are the world's most...

Superspecial: Outbreak

CALLING ALL CAHILLS! Announcing a 39 Clues Superspecial adventure -- the gang is back, and called to investigate one of their own: Sinead Starling.