Cimmerians lived on a planet protected by the Asgard and worshiped Thor as their god and protector. Thor placed a Goa'uld symbiote detector at Cimmeria's stargate which would transport any Goa'uld host or Jaffa to a labyrinth hidden deep in the mountains. The only exit from this labyrinth was through the doorway which contained a symbiote-killing device, called Thor's Hammer, which allowed only the host to leave the mountain alive. SG-1 met the people of Cimmeria in the episode, 1.10 "Thor's Hammer", and revisited the planet in the episode, 2.06 "Thor's Chariot". It was on Cimmeria that the true nature and physical appearance of the Asgard were revealed.