Watch The Kardashians: Billion Dollar Dynasty

Part two of two. The second episode examines the impact of Kanye West on the family's fortunes, as well as how they used social media as a successful business vehicle. At the age of just 21, little sister Kylie Jenner takes Kim's playbook to the next level, launching a make-up range that makes her an overnight billionaire, but all is not what it seems.

The first episode looks back to 2007, when Kim Kardashian was a relative unknown, living in LA and working as an assistant to Paris Hilton, as well as examining the beginnings of the family's first reality TV show.