Riz Khan - CIA: Undercover lover

Are spy romances merely the stuff of films - or does life sometimes imitate art? What happens when espionage and romance mix? And what roles do CIA operatives play around the world?

On Thursday we talk to the real life 'Mr and Mrs Smith' -- former CIA agents Robert and Dayna Baer, about international espionage, covert operations and undercover romance - and why they decided to give it all up.