Are You Being Served? - Season 4 Episode 5 -

It's Mrs.Slocomb's birthday and the staff decide to pull together and buy her a gift. But Miss.Brahms remembers that last year Mrs.Slocomb said she was as old as her cat, then 49. So the staff assume that this year she will turn 50. Because of this, it is decided that the occasion calls for something extra special so a professional birthday cake, made by a friend of Mr.Humphries, and a proper chorus of "Happy Birthday to You" is prepared. But what will the staff do when they realize that they don't even know Mrs.Slocomb's first name?