[2] After graduation he worked as a newspaper reporter for the Sunday Tribune and later with The Irish Press in Dublin, covering finance, sports and news.

The BBC was sued for defamation, avoided court through a settlement, and issued a statement admitting that MacIntyre had misrepresented the agency in his programme, but that they stood by him.

[6] In 2007, MacIntyre set out to create a documentary because he wanted to "do a Michael Moore for gangsters," in penetrating a world of super-rich villains who enjoy a life of luxury with no legitimate means of support: "It was interesting to make a 180-degree turn from my covert-reporting heritage and have full access.

This series included the Polonium commercial that the British Government banned out of sensitivity to the family of the murdered Russian dissident Alexander Litvinenko who was killed using the substance.

[10] In 2010, MacIntyre briefly co-hosted ITV1's local news show London Tonight, stepping down after six months in the post.

[11] He writes for Sunday World and is a visiting professor of criminology at Birmingham City University in which capacity he has been a panelist on the Crime Bites Podcast.

Initially signed as a reserve in case of injury to other participants, he took the place of the incapacitated Melinda Messenger from the fifth night (30 January 2014).