The 100's Grounders and Sky People have a treaty, but their partnership will be far from peaceful.

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"Survival of the Fittest" will bring the Grounders into the Sky People's encampment for an exchange of information. As the two factions learn each others fighting skills, tensions will ultimately get out of hand, causing an unscheduled display of everyone's new found battle techniques.

"We'll see a contingent of Grounders coming to Camp Jaha and showing the way that they train, and the Ark people are going to show them how to use guns and it's going to be great, right?" executive producer Jason Rothenberg teased. "Everybody's going to link arms and it's going to be kumbaya time. Not exactly. It doesn't exactly work out that way."

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Elsewhere, Jaha won't help the growing violence by arming Murphy. Jaha will take advantage of the momentary peace to see his son's grave, pulling Murphy of work detail to help him locate the unmarked burial ground.

Find out more when The 100 airs Wednesdays at 9 p.m. ET on The CW. Click the video below to see a preview for the series' next episode, "Survival of the Fittest."