Danger Mouse, The Greatest Secret Agent in the World! Remember the tune to this fantastic cartoon, I certainly do. This great superhero cartoon was broadcast in the early 80's and featured the white mouse secret agent and his sidekick a hamster called Penfold. They would be given assignments for each episode by their commander Colonel K, a walrus. Their main enemy was a frog called Baron Silas Greenback and his henchman crow called Stiletto.