Victor Meldrew

Victor Meldrew was a fictional character in the popular BBC One sitcom One Foot in the Grave, created by David Renwick and portrayed by Richard Wilson. The character epitomised the archetypal grumpy old man. Meldrew is a foil for the bothersome aspects of children, cars, animals, power cuts or next-door neighbours (his particular example being Patrick Trench, played by Angus Deayton).
Character
In the first episode, the cantankerous Meldrew is forced into retirement as a security guard, even though he is only 60 years old. The series follows Meldrew as he attempts to fill his new-found leisure with odd jobs, unusual idiosyncrasies, or to get a new working job. However, he regularly finds himself mistreated, misunderstood or simply the victim of bad luck, which regularly leads to his complaining heartily.
The pensioner is most famous for his catchphrase, "I don't believe it!", an expression of discontent which was actually used fairly infrequently...