"Teso Dos Bichos" is the eighteenth episode of the third season of the science fiction television series The X-Files. It premiered on the Fox network on March 8, 1996. It was written by John Shiban, and directed by Kim Manners. The episode is a "Monster-of-the-Week" story, unconnected to the series' wider mythology. "Teso Dos Bichos" earned a Nielsen household rating of 10.7, being watched by 17.38 million people in its initial broadcast. The episode received mostly negative reviews. The show centers on FBI special agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) who work on cases linked to the paranormal, called X-Files. In this episode, Mulder and Scully investigate a series of deaths that occur immediately after an ancient artifact is brought to Boston from an excavation site in South America. According to Scully, the deaths appear to be the result of political terrorism, but Mulder suspects something more improbable. The production for "Teso Dos Bichos", which was strongly disliked by the cast and crew of The X-Files, was plagued by several issues. Director Kim Manners, who had particular disdain for the episode, later made T-shirts and gave them to the cast and crew that read "'Teso Dos Bichos' Survivor". The episode's title translates from archaic Portuguese into English as "Burial Mound of Small Animals," although other translations have been proposed. Plot At an archaeological dig in the Ecuadorian highlands, two archaeologists, Dr. Bilac and Dr. Roosevelt, get into an argument over the removal of a burial urn that contains an Amaru, or a female shaman. Roosevelt argues that the urn must be taken from the site and preserved in a museum, much to the chagrin of Bilac and the tribespeople present. Later, a native shaman distributes Yaje to the local villagers and Bilac. During this ritual, a jaguar spirit kills Roosevelt in his tent. Later, in Boston, Fox Mulder and Dana Scully investigate the disappearance of Dr. Craig Horning, an archaeologist from a local history museum, after a security guard discovers a large amount of blood in Horning's lab. They interview both the curator, Dr. Lewton, and graduate student Mona Wustner. They also visit a reclusive Bilac. After closing, Lewton is killed by the jaguar spirit after his car doesn't start. During an investigation of the crime scene, Scully comes across rat corpses in the engine compartment of Lewton's vehicle. Mona denies that anything unusual has happened