Hammond became a presenter on Top Gear in 2002, when the show began its present format. He is sometimes referred to as "Hamster" by fans and his co-presenters on Top Gear.[4] His nickname was further reinforced when on three separate occasions in Series 7, Hammond ate cardboard, mimicking hamster-like behaviour. Another running gag by co-host Jeremy Clarkson is Hammond's supposed use of teeth whitener,[5] and it was staged to appear that he was caught looking at a website on teeth whiteners on Richard Hammond's 5 O'Clock Show. Clarkson had found a pack of teeth whiteners in a car Hammond had tested. Hammond had objected, saying it was a set up.