We finally see the survivors of the tail section in ‘The Other 48 Days,’ where Ana Lucia, Mr. Eko, and others reveal the brutal challenges they faced. Then in ‘Collision,’ tensions explode as Ana Lucia clashes with the main camp in the wake of tragedy. Our millennial uncle recalls how these episodes expanded the Lost universe, while Nick gives fresh insight into the blending of two survivor groups and the rising conflicts that threaten them all.