It’s a thin line between spying and meddling. And it’s one that's only faintly drawn in the manual once given to new undercover police officers - written by a familiar name. Read Cara’s notebook:&nbsp;<a href="http://www.telegraph.co.uk/bedoflies" rel="noopener noreferrer" target="_blank">www.telegraph.co.uk/bedoflies</a>&nbsp;|For 30 days’ free access to The Telegraph:&nbsp;<a href="http://www.telegraph.co.uk/liespodcast" rel="noopener noreferrer" target="_blank">www.telegraph.co.uk/liespodcast</a>&nbsp;|Get in touch: podcasts@telegraph.co.uk<a href="http://www.telegraph.co.uk/audio" rel="noopener noreferrer" target="_blank">&nbsp;</a>and on Twitter @cjmcgoogan |See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.

Fightback

A taxi driver is shot dead in front of his children. A high-security room goes up in flames. Then terrorists are unmasked as spies. And behind it all, a shadowy unit of the British Army.Award-winning journalist Cara McGoogan investigates the biggest cover-up of the Northern Ireland Troubles and asks: is the British state getting away with murder?The first and second series of Bed of Lies are also available to listen to on this feed:Series 2: It was meant to be a miracle treatment, but it became a deadly poison. Cara McGoogan investigates the story they didn't want you to know - and one of the biggest medical disasters in history.Series 1: They have the perfect relationship, until one day he vanishes. Her hunt leads to other women just like her - and a web of state-spun lies. This is the untold story of one of Britain's biggest secrets. Hosted on Acast. See acast.com/privacy for more information.