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Surrey, England, 1985.

Brian Keenan kneels in the chapel of Swaleside Prison. He's a high-ranking member of the IRA

and serving 18 years for his role in several terrorist attacks. He bows his head in prayer as a Catholic

priest intones the final lines of Sunday Mass. Oh God, Almighty Father, in the unity of the Holy Spirit, all glory and honor is yours, forever

and ever.

As the service finishes, Keenan shuffles discreetly along his pew and kneels next to another prisoner, Michael Betany,

for what is supposed to be a moment of private prayer.

Bettany is a former MI5 officer, now serving a 23-year prison sentence for trying to pass secrets

to the Soviets. He's usually kept away from other prisoners,

but these religious services offer a rare chance for inmates from different wings to meet.

And Keenan's been using these Sunday services to forge an alliance with Bettany.

He offers the fallen MI5 officer protection and favours.

In return, Bettany shares secrets from the heart of British intelligence. the fallen MI5 officer protection and favours.

In return, Bettany shares secrets from the heart of British intelligence,

secrets of value to the IRA.

Bettany keeps his eyes ahead towards the altar and speaks to Keenan under his breath.

And suppose you boys are saying a prayer of thanks for that trial collapsing.

Aye.

Turns out those supergrass wasn't that super after all.

The supergrass they're discussing is IRA getaway driver turned RUC informer, Raymond Gilmore.

The trial of 35 alleged IRA terrorists built on his testimony has just collapsed.

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