in the museum. Mulder and a group of police search for Lewton's remains. Scully sees blood dripping on Mulder's face from above and, upon looking up, they see a portion of Lewton's intestine hanging from a tree. Scully, about to perform an autopsy on the intestine, is interrupted when Mona suddenly calls and reports that Bilac was under the influence of Yaje. At the museum, Mona hears noises from a restroom and, upon opening a toilet lid, she sees rats forcing their way out of the sewer. When the two agents arrive, they discover Bilac crying beside one of the toilets, saying that Mona is dead. Later, Bilac escapes from the room in which he is being held without exiting through the only door. Mulder notices a large drag mark through the dust on the floor, discovering a hatch leading to the museum's old steam tunnels. While exploring the tunnels, the agents find the remains of the victims and are attacked by a multitude of feral cats. As they try to escape, they come across Bilac's mutilated body. The two agents make their way out and close the hatch on the pursuing cats. The episode closes with Mulder suspecting that the animal attacks were associated with the burial urn that had been removed against the wishes of the Ecuadorian tribespeople; it is shortly returned to the burial grounds, where the local shaman watches the urn's reburial with jaguar-like eyes. Production "Teso Dos Bichos" was written by John Shiban, who claims to have derived the episode's title from an ancient chant. The words translate into Galician-Portuguese as "Burial Mound of Small Animals," although other translations have been proposed. Unbeknownst to Shiban, in parts of Colombia and Venezuela, the word "bichos" is a euphemism for testicles; Shiban later joked that this "controversy" would be "good for ratings". The production of the episode was plagued with issues. At the last minute the ending of the episode had to be rewritten; originally, the episode was to feature "hordes" of common house cats attacking Mulder and Scully, but the cats refused to attack under direction, doing "pretty much nothing". To further complicate matters, Gillian Anderson had a severe cat allergy, and so the whole sequence was nixed. While director Kim Manners felt that the episode's first three acts were "the best three acts of television [he had] ever directed", he believed that the fourth act