Some Mothers Do 'Ave 'Em by Crawford himself, as well as featuring various well-remembered and much lampooned catchphrases, that have become part of popular culture. In a 2004 poll to find Britain's Best Sitcom, "Some Mothers Do 'Ave Em" came 22nd. The expression "Some mothers do have them" is meant to refer to someone clumsy or foolish. The wimpish, smiling Frank, sporting his trademark beret and trench coat, is married to the apparently normal Betty (Michele Dotrice) and in later series they have a baby daughter, Jessica. The character was popular with television impressionists such as Mike Yarwood in the 1970s, particularly his main catchphrase,
Some Mothers Do 'Ave 'Em "I am he." He also becomes more self-assured, and much more willing to argue back when criticised, and often wins arguments by leaving his opponents dumbfounded by the bizarreness of what he would say. Acknowledging the show's success in Australia, the final series saw him begin talk of having relations there, and contemplating emigrating. Crawford himself has talked of how he based many of Frank's reactions on those of a young child. Crawford also found it difficult to break out of the public association with the role, despite his later career as a hugely successful musical performer on the West