In Northern Ireland, from the late 70s to the early 90s, the IRA killed over 40 alleged informers.

But the man who often found, tortured and sometimes killed these people on behalf of the IRA

was himself an informer, a secret British army agent with the codename Stakeknife.

Who gets to play God? And why me? Why my family?

When lies are still being told to this day, who do you believe?

I wouldn't even know where to start, and I'm with the IRA.

Steakknife.

Listen first on BBC Sounds.

Just before this BBC podcast gets underway, here's something you may not know.

My name's Linda Davies,

and I commissioned podcasts for BBC Sounds. As you'd expect, at the BBC we make podcasts of the

very highest quality, featuring the most knowledgeable experts and genuinely engaging voices. What you

may not know is that the BBC makes podcasts about all kinds of things,

like pop stars, poltergeists, cricket and conspiracy theories.

And that's just a few examples.

If you'd like to discover something a little bit unexpected,

find your next podcast over at BBC Sounds.

This is the BBC.

Hello, today we pop corks for the centenary of the Crem de la Crem of Scottish writers Muriel Spark.

And Adam Foles lends a hand in exploring writing within the confines of a troubled mind.

First, though, a national treasure.

Long before J.K. Rowling, Alexander McCall-Smith

...