Episode 16 of "Jeremiah"
s01e16 Moon in Gemini

Kurdy and Elizabeth try to make contact with an isolated "black power" movement, the Crescent Shadows, while Erin drags Jeremiah along to help get her twin sister Lauren out of trouble. Lauren is on the run from a boyfriend, Geronimo, and the two sisters have issues. Matters get further complicated when Lauren sleeps with Jeremiah. Then Geronimo shows up as Luaren knew he would and mistakes Erin for Lauren, and Erin inadvertently kills him in the subsequent fight. Meanwhile Purdy finds the Shadows and their leader Kwame are prejudiced and aren't interested in meeting with anyone else, and his lieutenant Raheem takes Purdy and Elizabeth prisoner. Kwame overrules him and lets him go rather then give in to violence and hate. Meanwhile, Jeremiah is left to wonder if it was Erin or Lauren in bed with him.