Viserion is one of the dragons born in the Dothraki Sea, along with Drogon and Rhaegal. He is named after Daenerys Targaryen's brother, Viserys. He is distinguishable by his cream and gold colored scales, and red-orange wings.
The majority of his scales are golden, with cream colored markings under his neck and tail, while his horns and spines are white. His wings are red orange, with black tints along the bones.
Daenerys is given three dragons eggs by Magister Illyrio Mopatis on the occasion of her wedding to Khal Drogo. She is drawn to these eggs and always keeps them in a chest with her. Viserys tries to steal them but is stopped by Ser Jorah Mormont.
He is born along with his two siblings after Daenerys has their eggs placed on the funeral pyre erected for her deceased husband, Khal Drogo. As she rises unharmed from the ashes of the pyre on the morning following the funeral, he climbs on her leg.
Viserion is not shown as much, until he is stolen by Xaro Xhoan Daxos, along with Drogon and Rhaegal. As Daenerys enters the House of the Undying to retrieve them, she evetually finds her three dragons chained. Pyat Pree attempts to chain her with magic claiming that her dragons make his magic strong, and that she makes them stronger, thus she will stay with them for an eternity. She whispers to her dragons, "dracarys," her command to breathe fire, and the three of them burn Pyat Pree alive, releasing his magic.Daenerys on her journey from Astapor and Yunkai. When Daenerys has a meeting with a Razdal mo Eraz, of the Wise Masters of Yunkai, Viserion fights over a piece of meat with his brothers when Daenerys makes a show of force to intimidate Razdal. After Daenerys frees the slaves of Yunkai, Viserion takes to the sky with his siblings at Daenerys's command; a show of both power and freedom. 
In response to Drogon's killing of a three-year old girl, Daenerys leads Viserion and Rhaegal into the catacombs of Meereen, where she chains them up.
|Season One appearances|
|Winter is Coming||The Kingsroad||Lord Snow||Cripples, Bastards and Broken Things||The Wolf and the Lion|
|A Golden Crown||You Win or You Die||The Pointy End||Baelor||Fire and Blood|
|Season Two appearances|
|The North Remembers||The Night Lands||What is Dead May Never Die||Garden of Bones||The Ghost of Harrenhal|
|The Old Gods and the New||A Man Without Honor||The Prince of Winterfell||Blackwater||Valar Morghulis|
|Season Three appearances|
|Valar Dohaeris||Dark Wings, Dark Words||Walk of Punishment||And Now His Watch is Ended||Kissed by Fire|
|The Climb||The Bear and the Maiden Fair||Second Sons||The Rains of Castamere||Mhysa|
|Season Four appearances|
|Two Swords||The Lion and the Rose||Breaker of Chains||Oathkeeper||First of His Name|
|The Laws of Gods and Men||Mockingbird||The Mountain and the Viper||The Watchers on the Wall||The Children|
In the books
In the A Song of Ice and Fire novels, Viserion is much the same. In contrast to his namesake, Viserion is noted as being the best behaved of Daenerys's three dragons, even compared to his brother Rhaegal. He is also the most friendly to other people besides Daenerys herself. His primary coloration is specifically cream, though he is often referred to as simply the "white" dragon.
Daenerys named Viserion after her brother Viserys. As she explained, "Viserys was cruel and weak and frightened, yet he was my brother still. His dragon will do what he could not."
Viserion's name hasn't been mentioned on-screen as of the end of Season 4, though it is stated in the Season 4 HBO Viewer's Guide, establishing that his name is the same in the TV continuity.