The Cast Before The 100 

The Cast Before The 100 shows clips of the main characters ( Octavia, Lincoln, Jasper, Murphy, Bellamy, Finn, Abby, Raven, Clarke, Monty, Jaha, and Kane) before they were in the show.
Marie ( Octavia ) in Walking The Halls: 0:06 - 1:03
Ricky ( Lincoln ) in Hollyoaks: 1:04 - 2:09
Devon ( Jasper ) in Diary of a Wimpy Kid: 2:11 - 2:54
Richard ( Murphy) in Judas Kiss: 2:56 - 3:50
Bob ( Bellamy ) in Home and Away: 3:52 - 4:50
Thomas ( Finn ) in Prom: 4:53 - 6:03
Paige ( Abby ) in The Game Plan: 6:05 - 7:07
Lindsey ( Raven ) in Chastity Bites: 7:10 - 7:45
Eliza ( Clarke ) in The Sleepover Club: 7:47 - 8:45
Christopher ( Monty ) in Squad 85: 8:50 - 9:16
Isaiah ( Jaha ) in Grey's Anatomy: 9:18 - 10:02
Henry ( Kane ) in Lost: 10:03 - 10:56
Thank you for watching. All the credit is to the tv shows and movies that are listed above and also through out this video.