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A new woman joins the group and tries to find her place while everybody else prepares to set sail for Mexico.

Tandy devises an escape plan to get away from Pamela and back to Carol and the others. Meanwhile, the rest of the gang encounters a castaway, Glenn, who has been stranded on an island for years.

Pamela tries desperately to redeem herself with everyone, as the gang finally reaches Mexico. Meanwhile, Todd is disappointed that Zihuatanejo is not the paradise of which he'd dreamed.

Carol panics when Todd and Melissa leave for their honeymoon, and Erica and Gail decide to live on their own for a while.

The gang moves into an old mansion; Carol forces Tandy to put down his new toys so they can baby-proof the giant estate; Melissa worries about Todd's health; Gail and Erica can't figure out why Dawn won't stop crying.

Carol's pregnancy takes an unexpected turn; Gail is concerned about Tandy as a father; Melissa discourages Todd's baby fever.

Tandy tries to convince everyone he's a feminist.

Todd asks Tandy for parenting advice when he notices that Jasper is acting more reckless than usual. Meanwhile, Carol and Erica realize that Jasper may be the only potential suitor for their babies and begin vying for his attention.

Tandy and Todd stumble upon a new survivor, Karl, who has been trapped in a high-security prison in Mexico ever since the virus hit.

Tandy and Todd introduce newcomer Karl to the rest of the gang. Meanwhile, the group searches for Jasper, who has gone missing.

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.

Tandy tries being a helpful, responsible adult in order to finally win Gail's praise. Meanwhile, Todd is furious with Melissa for keeping him away from Jasper.

Todd sinks into a deep depression, leaving the rest of the gang to console him. Meanwhile, Tandy and Carol can't keep their hands off each other.

While Todd butts heads with Erica, Melissa is determined to form a strong female friendship with her. Meanwhile, Carol grows suspicious that a new stranger could be living nearby.

Tandy wakes up to a shocking discovery that is positive for everyone in the group, but it throws Todd into a spiral. Meanwhile, Todd and Erica share an emotional roller coaster.

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.

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.

The gang decides to leave the mansion in Zihuatenajo and find a new place to live, but Tandy has second thoughts.