Guest Stars Richard Briers as Chief Caretaker Judy Cornwell as Maddy Howard Cooke as Pex Julie Brennon as Fire Escape Catherine Cusack as Blue Kang Leader Brenda Bruce as Tilda Clive Merrison as Deputy Chief Cartaker Elizabeth Spriggs as Tabby Simon Coady as Video Commentator Joseph Young as young caretaker Astra Sheridan as Yellow Kang Annabel Yureshka as bin liner