Birds of a Feather

As Linda Robson and Pauline Quirke, who play Tracey and Sharon, had been best friends since childhood, real life photos of the pair growing up were used in the opening credits - although the earliest photo features only Robson; the baby representing Sharon is actually Robson's real-life sister. However, the famous home movie footage from the closing credits is not Robson and Quirke, but was specially commissioned using child actresses who resembled the pair.

Chris's full name switches between Christopher and Kristakis depending on the episode.

The series 3 - 9 opening theme tune was sung by Pauline Quirke & Linda Robson.