The couple treks through Mongolia with nomadic herders. Worn down by the grueling climate, PJ wonders if her engagement to Tim is a mistake.

Tim and PJ bicker while visiting a spiritual community in Brazil. To reconnect, they go down the Amazon to a sacred tree and Tim takes a hallucinogen.

Haunted by Tim's bad trip, the couple visits the tropical island of Yanaba, where villagers have planned a wedding. Will PJ leave Tim at the altar?

Indonesia’s Sasak people show Tim how to fight like a love warrior. PJ publicly praises his machismo but privately rolls her eyes.

In a Papua New Guinea village, Tim and PJ undergo fertility rituals that include sacrificing a pig and locating an egg that could reveal their future.

Visiting a Cameroon tribe claiming to have the world's happiest marriages, PJ undergoes a ritual possession. Tim builds a love shack and gets sick.

Jealousy flares when PJ teams up with a handsome member of Nigeria's polygamous Wodaabe tribe, prompting Tim to face some hard truths about himself.

In China, a negative horoscope reading drives Tim and PJ to prove their commitment. Pivotally, PJ must deal with her painful past and learn to cry.