The Season 4 finale: After discovering hidden dangers in their mansion, the group decides to part ways with their home in Zihuatanejo and embark on a new destination. However, Tandy has second thoughts about what they may be leaving behind.
The gang ventures out in search of what they think could be a new sign of life, but are surprised at what they actually find. Meanwhile, Todd makes a few morbid discoveries of his own back at the mansion.
A thermal heat detector reveals a potential sign of life outside of the Zihuatanejo village, but Tandy doesn't want the group to split up to go investigate. Meanwhile, Todd and Erica have trouble seeing eye-to-eye.
After the graveyard incident, Tandy and Todd try to convince the rest of the gang that something is majorly wrong with Karl and something needs to be done. Meanwhile, Jasper is still missing. The Season 4 spring premiere.
The gang settles into an old mansion previously owned by an infamous cartel leader. While Carol forces Tandy to put down his new toys so they can baby-proof the giant estate, Melissa worries about Todd's physical health; and Gail and Erica can't figure out why Dawn won't stop crying.
Carol panics when Todd and Melissa leave for their honeymoon and Erica and Gail decide to live on their own for a while. She and Tandy devise the ultimate plan to convince everyone it's safer to stick together.
In the Season 4 premiere, Pamela finds her place within the group as they all set sail for Mexico, avoiding the apocalyptic nuclear fallout in the U.S. Their course derails a bit when they realize that none of them knows how to actually navigate a yacht.