The Liver Birds sequence for series one also exists but in poor quality. The first series was stopped after four episodes because Polly James' hectic schedule—working every evening on "Anne of Green Gables" in the West End, then rehearsing all day for the TV show—was proving too much. By the time James was available again, Pauline Collins had moved to LWT's "Upstairs, Downstairs". The producer Sydney Lotterby remembered having worked with Nerys Hughes on "The Likely Lads" and, wrongly believing the Welsh actress was from Liverpool, asked her to read for a part in "The Liver Birds". (Neither actress really had a Liverpool
Polly (Doctor Who) in case it would be confused with earlier companion Barbara Wright. In "The Faceless Ones", a double of Polly is named Michelle Leuppi; an apparent mishearing of this and misinterpretation of the context led to some reference works giving Polly the last name of "Lopez". Anneke Wills suggested the name "Bettingham-Smith", after one of her friends. In the Virgin Missing Adventures novel "Invasion of the Cat-People" by Gary Russell, Wright is expressly given as Polly's last name, as it was supposedly given in Gerry Davis's character breakdown and audition script sample when, as story editor, he and producer Innes Lloyd