The Cave of Two Lovers

On their way to Omashu Aang, Katara, and Sokka meet a group of nomads who show them a shortcut through the "Cave of Two Lovers". But when the group becomes trapped in the cave, it's up to Aang and Katara to save the group by trusting in love, and possibly questioning their relationship. Meanwhile, Iroh gets a lethal rash and so he and Zuko head to a small Earth Kingdom town for help, hoping their real identities will not be discovered.