A hallucination was the perception of something that was not present.

History and specifics[]

Hallucinations were a side effect of the Klingons' thought-shield, especially to James T. Kirk and Montgomery Scott when they visited Organia (which was confined in one) in 2269. (TOS novel: Spock Must Die!)

In 2326, Cadet Jean-Luc Picard at first thought his sightings of Delcara were hallucinations. (TNG novel: Vendetta)

In 2369, DTI agents Marion Dulmur and Gariff Lucsly asked Montgomery Scott about a time traveling Captain Pavel Chekov apparently appearing aboard the USS Enterprise during its voyage to the Babel Conference in 2268. Scott suggested that he might have hallucinated the whole thing, a result of leaking gas fumes in engineering. Afterward, however, he checked that a mysterious device left by Chekov was still safely aboard the Goddard shuttlecraft. (STO - The Short Story Collection short story: "Time of the Scotsman")

Also in 2369, Doctor Beverly Crusher discovered that Pelavians exhaled chemicals which caused hallucinations in Humans when inhaled. (TNG - The Amazing Stories short story: "On the Scent of Trouble")

Appendices[]

External links[]

• Hallucination article at Memory Alpha, the wiki for canon Star Trek.
• Hallucination article at Wikipedia, the free encyclopedia.