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Odo is a shapeshifter played by Rene Auberjonois on the science fiction television series Star Trek: Deep Space Nine.
Warning: Wikipedia contains spoilers
He was one of the hundred sent out by The Founders long ago to explore the galaxy. He was found adrift in the Denorios Belt by a Bajoran in 2356 who gave him his name, which derives from the Cardassian for "unknown specimen," odo ital, literally, "nothing." He was studied by a Bajoran scientist, Dr. Mora Pel, under the auspices of the Cardassians; Odo modelled his humanoid appearance on Dr. Mora, but he could not duplicate humanoid features with precision, making his humanoid appearance an approximation.
He later worked for the Cardassians during Occupation of Bajor aboard the orbiting Terok Nor ore-processing space station and later for the Bajorans/Federation aboard Deep Space Nine (the Federation name for Terok Nor).
Up until this time, Odo was unaware of his people and his ancestry. A criminal showed him a necklace containing a non-sentient shapeshifter in the episode "Heart Of Stone". Later, in the episode "The Alternate", Dr. Mora visited Odo at Deep Space Nine and went with him to the Gamma Quadrant to investigate a planet with a similar life-form. It wasn't until later that Odo learned that his people are the leaders of the Dominion.
He had a relationship with Kira Nerys until he left to rejoin The Great Link.
See also: Star Trek

