Watch The 100 S03e07 1 -

: Flashbacks to 97 years prior reveal that a scientist named Becca created ALIE 2.0 , an AI designed to interface biologically with humans to ensure survival. After Earth was destroyed by ALIE 1.0, Becca fled to the ground from the 13th space station, Polaris , becoming the first Commander.

: Tensions reach a breaking point between the 12 Grounder clans and the 13th clan ( Skaikru ). Lexa chooses peace over vengeance by ordering a blockade instead of an all-out attack on Arkadia, a decision that ultimately weakens her position in the eyes of her people. The 100: Thirteen Review | Den of Geek Watch The 100 S03E07 1

: In a moment that sparked significant fan backlash, Commander Lexa is accidentally shot and killed by her advisor, Titus , while he was attempting to assassinate Clarke. Before dying, she makes Titus promise to protect Clarke. : Flashbacks to 97 years prior reveal that