Danger Mouse (voiced by David Jason): The world's greatest secret agent, so secret in fact, that his codename has a codename. He speaks 34 languages fluently, including some extraterrestrial ones. He regularly balances himself on his index finger and bounces up and down on it (something that Remo Williams has also been known to do); he refers to this as "going into a 7th level Yoga-Hopping Trance". Referred to as the "White Wonder" and "Wretched Rodent" by Baron Greenback. Catchphrases: "Good grief!", "Penfold, shush!", "Blast!" He is also a practitioner of the ancient martial art of kung moggy. He was originally going to be brown; however, the creators thought that he needed a different colour to Penfold's.