It's not an ideal situation by any means, but somehow the Sky people and the Grounders have found a way to coexist - at least for the time being. But how long after they figure out that Clarke (Eliza Taylor) and Lexa (Alycia Debman Carey) left them to be blown up without so much as a courtesy warning before all hell breaks loose on The 100? With war on the horizon, the Commander better cross her fingers that no one with a big mouth realizes that their fearless leader was willing to sacrifice everyone except herself for the cause.