Explores the two sides of the Household Cavalry in action, the armoured regiment on manoeuvre in Canada, and the trainees preparing to guard the Queen for the first time.

Adam and Fiona's marriage is tested to breaking point when she insists on going undercover on an operation that leads straight back into her troubled past. Show more

Time-travelling zoologist Nigel Marven continues his CGI enhanced journey through the prehistoric marine world. A visit to the Pliocene era provides an encounter with a giant shark called a Megalodon. Show more