With Singh on the move, John B and JJ scramble to catch him. Pope makes a breakthrough. Sarah questions where her loyalties lie.

Rafe lays his cards on the table and Sarah calls in two favors. JJ's unorthodox plan to get to South America lands John B in hot water.

The Pogues' search for El Dorado brings them deep into the jungle, where John B and Sarah face the ultimate test of their courage and family bonds.