Mission 1: Deadly Secrets

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YOUR MISSION

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

Your Mission: Stop The Outcast!

Mission 2: The Enemy Within

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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

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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

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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.
by darkqueen30
by fearlessmind19

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