Why would you make a great CBBC intelligence officer? | Blue Peter
Blue Peter is back at Spy School. Six candidates attempt to become the CBBC intelligence officers who will have a once-in-a-lifetime opportunity to go inside MI5 headquarters.
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![](https://era.org.uk/app/uploads/2021/01/CBBC-Blue-Peter-Project-Enigma-–-Cracking-codes-in-London-400x230.jpg)
Project Enigma - Cracking codes in London | Blue Peter
The competition winners use a replica working Enigma machine to crack their own puzzle set by GCHQ.
![](https://era.org.uk/app/uploads/2021/01/CBBC-Blue-Peter-Project-Enigma-–-GCHQ-Tour-and-challenge-400x230.jpg)
Project Enigma - GCHQ Tour and challenge | Blue Peter
The competition winners, get their first look inside GCHQ and are given their top-secret mission to crack.