In August 2010, 31 year old MI6 cryptologist Gareth Williams was found dead, in his flat, in his bath, padlocked inside a bag.

Pretty much zero forensics would be found, and the case still remains unsolved to this day.Was Gareth murdered? If so, then who by? And why?

And is it likely that a spook could be murdered in his home, just yards from MI6 HQ, and they can't find who did it? Join the girls this week as they try to decipher what really happened.

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