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The Hellmans are a typical, all-American suburban family in every way except one: they're from hell. They've been sent to Earth by Satan, on a mission to stop humans from drilling into their underworld home.
The Hellman family is sent to Earth's surface to save hell from human beings.
Balthazor joins his boss on a golf outing, while the family struggles to fit in with the humans.
Mandy starts to date Killbride's son and Balthazor uses this opportunity to get closer to Killbride.
Tina and Balthazor try to celebrate their wedding anniversary but are finding it difficult to find time to do so. Meanwhile, Killbride is trying to get a new business plan passed by the EPA and when he learns that the female EPA executive is enamored with Balthazor, Killbride uses him to his advantage.
Tina's parents from Hell make a visit to Earth, Balthazor makes an extra effort to impress Tina's father. Concerned that their daughter and grandkids will assimilate too well into human culture, the in-laws arrive with a plan to bring the family back to Hell.
Killbride has a new initiative to collect dogs in exchange for guns.
After Killbride’s company creates a new weight loss robot, he uses it as the new leader of the neighborhood watch.
Tina shows the town to the wife of a Japanese businessman; switched personalities threaten Hellman's mission.
Tina tries to spend time with Mandy; Killbride entertains a Japanese executive.
Mandy's 15th birthday; Balthazor is recruited by a mysterious man to destroy the drill.
