Tales of the Riverbank, sometimes called Hammy Hamster and Once Upon a Hamster for the Canadian version, is a British children's television series developed from a Canadian pilot. The original series was later broadcast on Canadian and U.S. television, dubbed by Canadian and US actors for the markets they were to be broadcast in.

The pilot was created by David Ellison and Paul Sutherland, CBC film editors, in 1959. After completing the pilot programme, CBC turned down the production and so Dave Ellison travelled to the BBC in London to show it. The BBC initially commissioned thirteen episodes, but extended this later. A second series was made in colour in the 1970s, narrated by Johnny Morris.