1x2 - Mystery of the Romanovs

September 26, 2016

When Russia's last tsar, Nicholas II, and his family disappeared 90 years ago, eyewitness accounts said the family was brutally murdered. What really happened to them?AKA: Romanovs: The Missing Bodies (UK)

1x3 - Vegas Mafia

October 3, 2016

In the 1950s, Mafia-built Las Vegas became a cash cow for organized crime, but when the richest man in the world arrived, things changed and the feds blew the lid on the original Gangster's Paradise.

1x4 - Bikers and Mobsters

October 10, 2016

Old-world traditions of the Mafia clash with the new ways of biker gangs when the two groups join forces to take control of Montreal's drug trade. Crime reporters, undercover cops and former mafia members shed light on the underbelly of this crime world

1x5 - L.A. Gang Wars

October 17, 2016

For gang members in South Central Los Angeles, the "hood" is a brutal war zone, where streets and reputations are vehemently defended, often to the death. NGC goes into this violent world for four months -- a period in which more than 60 L.A. residents are killed or wounded in gang shootings. Watch an emotional funeral, see 11-year-olds brandishing their weapons, and hear the stories of those entangled in this chilling cycle of bloodshed.

1x6 - Episode 6

October 24, 2016

1x7 - Inside Al Queda

February 20, 2017

See how this Islamic terrorist network continues to morph, selects and trains militants to blend into Western society, and inspires a global jihadist movement. Meet men who know and have fought with Osama bin Laden and find out why he's still at large

1x8 - American Skinheads

November 7, 2016

From secret codes on the Internet to violent lyrics in head-banger metal music, this burgeoning white power movement is finding new ways to spread its message of racial pride and separation.

1x9 - Philly Mob

November 14, 2016

After the godfather of the Philadelphia mob was assassinated, wise guys battled for the top position -- and the Mafia's code of silence began to crumble. Mafia soldier Nick 'The Crow' Caramandi and hit man Ron Previte describe gangster life in transition.

1x10 - Episode 10

November 21, 2016

1x11 - Eposode 11

November 28, 2016

1x12 - Eposode 12

December 5, 2016

1x13 - Eposode 13

December 12, 2016

1x14 - Eposode 14

December 19, 2016

1x15 - Eposode 15

December 26, 2016

1x16 - Eposode 16

January 9, 2017

1x17 - Eposode 17

January 16, 2017

1x18 - Eposode 18

January 23, 2017

1x19 - Eposode 19

January 30, 2017

1x20 - Eposode 20

February 6, 2017

1x21 - Eposode 21

February 13, 2017

1x22 - Eposode 22

February 20, 2017

1x23 - Eposode 23

February 27, 2017

1x24 - Eposode 24

March 6, 2017

1x25 - Eposode 25

March 13, 2017

1x26 - Eposode 26

March 20, 2017

1x27 - Eposode 27

March 27, 2017

1x28 - Eposode 28

April 3, 2017

1x29 - Eposode 29

April 10, 2017

1x30 - Eposode 30

April 17, 2017

1x31 - Eposode 31

April 24, 2017

1x32 - Eposode 32

May 1, 2017

1x33 - Eposode 33

May 8, 2017

1x34 - Eposode 34

May 15, 2017

1x35 - Episode 35

May 22, 2017

1x36 - Episode 36

May 29, 2017

1x37 - Episode 37

June 5, 2017

1x38 - Episode 38

June 12, 2017

1x39 - Episode 39 - Final

June 19, 2017