Sidewinder Syndicate

The Sidewinder Syndicate were an organised gang of reptile gangsters encountered by both the Doctor in his tenth and eleventh incarnations.

History
The Doctor met the Sidewinder Syndicate during a visit to a bar in America. The Syndicate attacked the bar, then left. The Doctor, Heather McCrimmon and Wolfgang Ryter tracked them down to a shop in the city were they were met by Snake-Eyes. The Doctor sent them home in their ship by scaring them with an animal picture book which included sharks and lions. (DWAM: Snakes Alive!)

The Doctor and Amy Pond met the Syndicate in a alien bank run by Ratlings. The Sidewinder Syndicate wanted their money from the bank, so they stormed it, demanding its return. When they received it, they realised it was fake. Amy discovered that the Ratlings had tried to hide the money from them. She showed them the real money in the vault. The Doctor and Amy left, allowing the Sidewinder Syndicate to deal with the Ratlings. (DWAM: Money Troubles)