Walker: This is Doris and Dora. They're twins.
Jones: Blimey, I thought I was seeing double. Here, which is which?
Walker: I don't know. One kicks and the other one bites.
(Walker notices Mainwaring's black eye.)
Walker: Where did you get that from?
Mainwaring: From the linen cupboard door, Walker.
Walker: What's the matter? Hasn't your old woman got a rolling pin?