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With Dr. Walsh nowhere to be found, the investigators continue their journey into the Australian outback, following the trail of Robert Huston toward the heart of the Great Sandy Desert.

Strange visitors in the night become a recurring theme for the investigators, and an untimely fumble leaves one member of the squad in grave peril.

As the investigators leave civilization behind and venture into the unforgiving Australian outback, their first night beneath the stars is interrupted by a haunting encounter.

The Mystery Squad receives ominous warnings about what lies ahead, but curiosity gets the better of them when they discover a fresh set of vehicle tracks leading off the Canning Stock Route.

The trail to Robert Huston grows stranger by the mile as the investigators uncover unsettling evidence that they are chasing more than a missing expedition.

Along the Canning Stock Route, the investigators discovers an abandoned mining camp.

After another terrifying night in the desert, the investigators stumble into a dig site where nothing is quite as it seems.

After another terrifying night in the desert, the investigators stumble into a dig site where nothing is quite as it seems.

Deep beneath the earth, the investigators attempt to learn more about Huston's machinations while encountering some of the city's strange denizens.

In the mid-season finale, the investigators recover after their meeting with a mind-altering new ally before the city's darkest secrets are set in motion.

In the ruins of an ancient cyclopean society, the final showdown in Australia plays out.

The Mystery Squad's journey in Australia comes to a disturbing end.

Skills are honed and sanity restored as the journey to Kenya begins.

A late night warehouse break-in is all that stands between the investigators and a long train ride to Nairobi.

After surviving a targeted attack on the train, the investigators arrive in Nairobi.