Walter O'Brien has one of the highest IQs in the world, with an estimated IQ of 197. As a teenager he made headlines when he hacked NASA from his family's farm in Kilkenny.
Now he runs Scorpion Computer Services, a company which works with the US Military, high net worth individuals and Film production studios. His life inspired the TV series, Scorpion.
This week Fine Gael TD Dara Murphy was in hot water over the Dáil expenses he claimed while working in a job in Brussels.
He isn't the first person in politics or business to have their expenses questioned. Gráinne Ní Aodha from The Journal has been looking at some other examples for us.
The founder of Maximum Media, Niall McGarry, stepped down following controversy over a click farm being used to falsely inflate user numbers. A click farm is where a large group of low paid workers are hired to click on paid advertising links multiple times. We discuss this problem and the growing distrust in tech with Dr Johnny Ryan of Brave.
Breaking into buildings, dodging security, conducting online scams, these criminal activities are all in a day's work for Jenny Radcliffe, who counts high net-worth footballers and celebrities among her clients.
The 'People Hacker' is paid by companies to test the weak points in their security systems.
In an era of emojis and memes, one traditional mode of greeting is still hanging on in there.
Experts say there was a decline of the greeting card industry in the mid-1990s but that has stopped in the last five years as millennials opt to go old school.
Liam Geraghty has been taking a look at the history of the Christmas card.