After joining the BBC in 1980, Peter Grimsdale became editor of Crimewatch and produced documentaries on a range of subjects including the Tamil uprising in Sri Lanka. In 1994 he became Channel 4's Commissioning Editor for Features and Religion, winning Royal Television Society Awards in both genres, before returning to the BBC in 1999 as Head of the Independent Commissionin Group, responsible for all of the BBC's independent programming. In 2000, he was back commissioning at Channel 4 where, among other things, he took charge of Big Brother. In 2004 he moved to the internet as Editorial Director for Yahoo Europe, where he overhauled all that portal's content operations, and then returned to television a year later as Controller for Science for Channel Five. He is married to writer and broadcaster Stephanie Calman. ANDY MCNAB joined the infantry as a boy soldier. In 1984 he was 'badged' as a member of 22 SAS Regiment and was involved in both covert and overt special operations worldwide. During the Gulf War he commanded Bravo Two Zero, a patrol that, in the words of his commanding officer, 'will remain in regimental history for ever'.

Awarded both the Distinguished Conduct Medal (DCM) and Military Medal (MM) during his military career, McNab was the British Army's most highly decorated serving soldier when he finally left the SAS in February 1993. He wrote about his experiences in three books: the phenomenal bestseller Bravo Two Zero, Immediate Action and Seven Troop.He is the author of the bestselling Nick Stone thrillers. Besides his writing work, he lectures to security and intelligence agencies in both the USA and UK. He is a patron of the Help for Heroes campaign.PETER GRIMSDALE is a multi-award-winning television producer with a raft of major documentaries to his credit. He is married to the writer Stephanie Calman and lives in south London.