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 Caroline and Christina Alessi played by Gayle & Gillian Blakeney. In February, Josh Anderson and Ryan McLachlan, played by Jeremy Angerson and Richard Norton, respectively, made their first appearances. That same month British actor Derek Nimmo guested as Lord Ledgerwood. Maggie Dence arrived as new principal Dorothy Burke in March. Bob La Castra joined the serial as Eddie Buckingham in April, and Stephen Hall also joined the cast that month as Boof. Beth Buchanan began playing Gemma Ramsay, the niece of established character Madge Bishop in June. The following months, three more members of the new Willis family arrived, Doug, Pam and Adam, played by Terence Donovan, Sue Jones and Ian Williams, respectively. Alison Whyte guested as environmentalist Amber Martin in September and Richard Huggett arrived as Glen Donnelly. Caroline Alessi Caroline Alessi, played by Gillian Blakeney, made her first on-screen appearance on 18 January 1990. Writers devised relationship stories for Caroline alongside the characters Adam Willis (Ian Williams) and Jim Robinson (Alan Dale). A notable storyline for the character was kissing her sister Christina's (Gayle Blakeney) husband Paul Robinson (Stefan Dennis). Christina Alessi Christina Alessi, played by Gayle Blakeney, made her first on-screen appearance on 18 January 1990. Christina is the twin sister of Caroline Alessi (Gillian Blakeney). Christina later marries long-standing character A notable storyline for the character occurred when she ran off with her son Andrew Robinson (Shannon Holmes) without informing Paul. Josh Anderson Joshua "Josh" Anderson, played by Jeremy Angerson, made his first on-screen during the episode broadcast on 5 February 1990. He arrives in Erinsborough because his father relocates to the area to run a news agents. Producers hired Angerson because they were increasing the size of the male cast following the departure of popular characters. Josh is characterised as friendly, academically bright and good at chemistry. The character helped to form the show's teenage character group of his era alongside Todd Landers (Kristian Schmid), Melissa Jarrett (Jade Amenta) and Cody Willis (Amelia Frid). Ryan McLachlan