The team heads into the rugged mountains of Peru to investigate claims that the Incan ruins there are haunted. Shrouded in the Andes mountains, the Incan city disappeared half a millennia ago: the residents reportedly buried their gold in the tunnels underneath the city and committed suicide before the Spanish conquistadors could invade. The investigation yields such compelling audio and visual evidence that Josh calls on expert analysts Steve Gonsalves and Dave Tango from Ghost Hunters to determine whether the Lost City is still inhabited with spirits. Then, the team takes their adventures to Alaska, where locals claim a giant winged bird is terrorizing their community. A nocturnal creature said to be part bird, part reptile, the "Thunderbird" has recently been sighted soaring high over the Alaskan landscape by local pilots. Josh and crew set out for a sub-zero exploration of the arctic terrain.