This highly successful series ran from 1991-1999. This clip centered around Tim and Mark working on the dishwasher, with the usual disastrous results. Mark was the youngest son of three and always believed what his brothers told him (for example, that the whole family but him were aliens and that he was not Tim and Jill's natural son), until Jill explained it to him. At the beginning, Mark was portrayed as slightly naive and in constant admiration of his father, but with age came wisdom to see the truth lol