Then Billy goes to New York to visit his father and his Italian grandmother, and discovers the secret of his magic money-box at last. In a wonderful adventure, he takes Mighty Mamma on a helicopter ride, cracks open a safe, solves a kidnap mystery — and gets to know his dad again. Andrew Sachs has performed widely in stage, film and television. Television work ranges from Manuel in Fawlty Towers , Einstein in Horizon Special: Einstein , Peter Pryce in Jack of Hearts , Joseph in Silent Witness and Murray in Attachments . Films include The Mystery of Edwin Drood and Nowhere in Africa . He also does commentating, radio work (winner of the Sony Radio Awards 1989 Best Actor) and numerous voice-overs and audio books (Performer of the Year, the Spoken Word Awards 1999) .