It's Unity Day!

An explosion rocks the Ark during the celebration The 100 Season 1 Episode 9. It sets into motion an uprising as the first Exodus ship is set to head to Earth.

The teens celebrate with drinks and games. Octavia sneaks out to meet with Lincoln. Finn follows her to talk to Lincoln about peace talks between the 100 and the Grounders.

A meeting between the two conflicting sides is set up, but it doesn't go as planned.

Watch The 100 online now.