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) Troughton), and they continue to travel with him. In "The Highlanders" (1966–67), Polly and Ben are joined on the TARDIS by Jamie McCrimmon (Frazer Hines). Eventually, the TARDIS finds its way back to 1966 London (in "The Faceless Ones") on the very day Ben and Polly had left (although about a year had passed for them). They decide to remain behind to resume their lives without disruption as the Doctor and Jamie travel on. Polly was never given a last name in the series. According to production notes, she was meant to be Polly Wright, but this was not used