Meet the people of the Michigan Militia who are ready for any eventuality.
Sun, 05 Mar 2.30am
Emotions run high in the extreme world of the Dallas County Jail, which which holds 6500 inmates and employs over 900 officers to maintain the peace.
Sun, 12 Mar 2.30am
In the legendary Metroflex gym in Texas size matters. It’s where men and women turn themselves into muscle mountains and body building champions are made.
Sun, 19 Mar 2.30am
A new breed of crusaders are putting themselves on the line to save the world from muggers and drug dealers.
Never miss a Nat Geo moment
Join our curious community and you'll have access to some great features!
Personalised content reflecting your interests on the site
Watch exclusive videos before anyone else
Favourite content that you like or want to check out later
Free SMS and Email reminders so you never miss a show
Get notified when content that interests you is published
Share your photos on Snap! that could appear on TV
Share your thoughts and opinions on various matters
Receive a monthly newsletter with loads of great content