Your web browser is out of date. Update your browser for more security, speed and the best experience on this site.
Skip to Main Content ⏎.
  • To report an imminent threat call 999 or ring the Anti-Terrorist Hotline on 0800 789 321
  • Current national threat level: SUBSTANTIAL
  • Find out more
MI5 101

This mission will test how much you know about MI5, what we do, and our history. Get five correct answers in a row to move onto the next mission.


This mission will test your analysis and communication skills. You’ll be asked to decipher coded messages sent by your agent in emojis. Crack the four encrypted messages to move on to the next mission.

Intelligence Debrief

This mission will put your memory and judgement skills to the test. You’ll have ten seconds to look at some items of interest to an investigation, and will then be asked a series of questions based on what you saw.

Intelligence Debrief

Latest News

View all news
King Charles III

Alongside the rest of the nation, we are delighted to celebrate the coronation.

Today, MI5, MI6 and GCHQ have published their gender pay gap reports