Some Mothers Do 'Ave 'Em recurring catchphrases include references to "a bit of trouble", which usually implies some sort of undisclosed digestive disorder, and to the cat having "done a whoopsie" (presumably a euphemism for having defecated in an inappropriate place, on one occasion in Spencer's beret). If Frank is pleased (or confused) about something, he will often use the catchphrase "Mmmm — nice!" or "Ohhh — nice!" Despite his unfailing ability to infuriate people, Frank is essentially a very sympathetic character, who inspires much affection from his ever-loving and patient wife, Betty. He also venerates the memory of his late mother, Jessica, and worships
Some Mothers Do 'Ave 'Em End and Broadway stage, in popular shows such as "Barnum" and "The Phantom of the Opera". Ronnie Barker and Norman Wisdom were the BBC's first and second choices for the role of Frank. However the casting of Crawford proved effective, as many of Frank's mannerisms and turns of phrase were invented by the actor (some having been used previously by Crawford in the film Hello, Dolly!), and his stunt-performing and singing skills were used in the series. In addition to Frank and Betty, most episodes would introduce at least one other character (a doctor, a neighbour, an employer, etc.) who