Royal Marines from 45 Commando braved the freezing temperatures of northern Norway during a recent arctic survival training exercise.
Joined by presenter Alexander Armstrong the Marines on Exercise Aquila 15 helped the comedian to swat up on his arctic drills.
The star of Pointless travelled to Harstad, Norway ahead of his bid to travel around the Arctic Circle and was given instruction on how to survive in the harsh environment.
The mountain and arctic warfare specialists gave lessons on how to catch, cook and eat food in a survival situation, how to build a survival shelter and how to start a fire from scratch.
Mr Armstrong said: “It has been extremely instructive. We had to pay attention and learn because this is a real situation that we could potentially find ourselves in.
“If you give up out here, you are going to last about an hour. That’s what you have to remember, you have to strive in this environment otherwise you’re curtains.”
Hundreds of Royal Marines have been learning to survive and fight outside for the past month, with temperatures as low as -35 degress Celsius and winds of up to 120mph.