Alpha Centauran

The Alpha Centaurans were a hexapod species, known for their nervous temperaments.

Biology
The Alpha Centaurans had tentacle-like limbs, each tipped with claws. Their heads were featureless except for a large eye. (TV: The Monster of Peladon) They were normally green in colour, though they would change in hue to match their mood. (PROSE: The Dark Path) Red, pink and black was for anger, purple was for sadness and yellow was for fear or nervousness. Alpha Centaurans could be incapacitated by a blow to the side of the head. (PROSE: Legacy)'

Despite their female-like voices, Alpha Centaurans were hermaphrodites and should properly be referred to as "it". Nevertheless, the Doctor generally used the masculine to refer to the Federation ambassador to Peladon. (TV: The Monster of Peladon) Every few years, they would develop certain urges and, if convenient, they would create an offspring. (PROSE: Legacy)

Culture
The Alpha Centaurans were known for being hypochondriacs. Alpha Centaurans never drank alcohol and could not see the appeal of it. (PROSE: The Dark Path) The Alpha Centauri were known for being adept at politics. (PROSE: Mission: Impractical) The Alpha Centaurans were greatly opposed to scandals and would do anything to cover them up. (PROSE: Shakedown) Apparently they enjoyed playing table tennis, having a Table Tennis Club. (TV: Robot) A fgan was an Alpha Centauran instrument. (PROSE: Rescue Mission) They opposed violence. (AUDIO: The Bride of Peladon)

History
In Shanghai in 1941, the Fourth Doctor helped a group of stranded Alpha Centaurans return home. (PROSE: The Shadow of Weng-Chiang)

The Eighth Doctor and Samantha Jones saw an Alpha Centauran on holiday on Kursaal. (PROSE: Kursaal)

Though Alpha Centaurans could be found in the Earth Empire, (PROSE: Original Sin, Shakedown, PROSE: Mean Streets) they became full members of the Galactic Federation. (TV: The Monster of Peladon)

On the ship Piri Reis, the cultural advisor was a Alpha Centauran named Epilira. It was later removed from existence by the Darkheart. (PROSE: The Dark Path)

During the entrance of Peladon into the Galactic Federation, Alpha Centauri acted as a diplomat. (TV: The Curse of Peladon) It later stayed on during the later war with Galaxy 5. (TV: The Monster of Peladon)

On the planet New Old Detroit, an Alpha Centauran named Hecto Shellac was such a brilliant lawyer that countless gangsters sought to use it to escape justice. Desperate for retirement, it prepared a World Bomb — capable of altering the whole planet according to the user's mind — to keep them off its back. Its dangerous actions were stopped when the Doctor activated the bomb and created a beautiful world with grass fields, supposedly because he "thought of England". Hecto survived, albeit somewhat humiliated. (COMIC: The Deep Hereafter)

In the 26th century, the Alpha Centaurans had a presence on Megerra. (PROSE: Shakedown, PROSE: Mean Streets)

In 4010, Alpha Centaurans were on board the Cressida to watch a rare chemical reaction in the atmosphere of Uranus. (PROSE: Uranus)

Undated events

 * The Second Doctor, Ben Jackson and Polly Wright encountered Venusians, Draconians and Alpha Centaurans at a spaceport bar. (PROSE: The Murder Game)
 * Fitz Kreiner once saw two Alpha Centaurans playing a game of multidimensional chess. (PROSE: The Blue Angel)
 * An Alpha Centauran was present on Paradost. (COMIC: The Glorious Dead)
 * Alpha Centaurans had a presence on Coralee. (PROSE: Storm Harvest)
 * An Alpha Centauran was present in the Frenko Bazaar. (COMIC: Prisoners of Time)