Neighbours is an Australian television soap opera created by Reg Watson. It was first broadcast on 18 March 1985. The following is a list of characters that first appeared in the serial in 1990, by order of first appearance. All characters were introduced by the show's executive producer Don Battye. The sixth season of Neighbours began airing from 11 January 1990. January saw the arrival of the Alessi twins and played by Gayle & Gillian Blakeney. In February, and , played by Jeremy Angerson and Richard Norton, respectively, made their first appearances. That same month British actor Derek Nimmo guested as . Maggie Dence arrived as new principal in March. Bob La Castra joined the serial as in April, and Stephen Hall also joined the cast that month as . Beth Buchanan began playing , the niece of established character Madge Bishop in June. The following months, three more members of the new Willis family arrived, , and , played by Terence Donovan, Sue Jones and Ian Williams, respectively. Alison Whyte guested as environmentalist in September and Richard Huggett arrived as .