Mission 1: Deadly Secrets

Mission1 opening hires

YOUR MISSION

A new enemy has arisen, a dangerous Cahill from the past.

Your Mission: Stop The Outcast!

Mission 2: The Enemy Within

Part4 bk2 image

MISSION ASSIGNMENT

The Cahill Web has been hacked!

We need YOU, Agent Cahill, to find the culprit and keep top-secret information from falling into dangerous hands.

Mission 3: Operation Revenge

Part4 bk3 main image c844ca0e9b

MISSION ASSIGNMENT

Find the Outcast's next target!

YOUR MISSION: Hack into the Outcast's e-mail to discover his secret plans.

Mission 4: Victory Lap

Part4 bk4 image 68ab0a1535

MISSION ASSIGNMENT

Dan Cahill is sending urgent messages requesting help with a top-secret mission. Are you up to the task?

Add Book Code

Enter Code

Enter your book code to unlock six digital cards and investigate extra evidence. Don't have a book? Click here for more information.

The CASEBOOK

The 39 Clues Doublecross Mission Casebook

After completing your mission, debrief by entering your findings here.

ON THE FORUMS

by Admin Lisa Q.