Derren Brown has a box-set of his TV specials out now. It features four of his most intriguing and controversial moments – The Heist in which he convinces ordinary people to stage a hold up, The System where he purports to have developed a flawless method for winning at the races, Séance in which he uses traditional techniques to supposedly contact the dead and Russian Roulette in which he famously aimed a gun at his head on live television.

We have three copies of this great box set up for grabs, as well as three copies of Derren's book Tricks of the Mind.

To be for a chance of winning, simply answer the following question:

When playing Russian Roulette, how many chambers of the gun contain a bullet?

a) 1
b) 2
c) 3

Email your answer to competitions@3sacrowd.com putting “Derren Brown” in the subject heading.

The competition closes on the 3rd December.

I'm off to bend some spoons...

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Only one entry will be accepted per person.

The competition is open to UK residents only. Overseas entries will not be considered.

If you are under the age of 16, you must obtain permission from your parent/guardian before entering. You must be 18 or over to enter a competition for tickets to one of our music sessions.

Entrants must provide their name, address and email (and phone number if required) when entering the competition. Three’s A Crowd will only use your personal details for the purpose of administering this competition, and will not publish them or provide them to anyone without your permission. Visit Three’s A Crowd privacy policy page if you would like to know more.

The winners will be drawn at random from all the correct entries, and only they will be contacted personally.

Prizes must be taken as stated and cannot be deferred.