List of Shortland Street characters (1992)
Guy Warner was the guidance councilor brother of Chris Warner (Michael Galvin). Craig Parker played him in a guest stint in 1992 before returning as a regular from 1993 to 1996. He appeared again in 2007.
List of Shortland Street characters (2010)
Dr. Isaac John William Worthington was the playboy cousin of Chris Warner (Michael Galvin). Quickly after getting a job at the clinic, Isaac's intentions were clear when he attempted to romance both Libby Jeffries (Fleur Saville) and Tracey Morrison (Sarah Thomson). He briefly dated Tania (Faye Smythe) and Harry's (Reid Walker) primary school teacher before he started an intense feud with Luke Durville (Gerald Urquhart). He reconciled with Tania but cheated on her with Zoe (Gina Varela). He started to date Brooke Freeman (Beth Allen) but his overspending resulted in a lock on his trustfund and Isaac was forced to participate in an illegal operation to fund his yacht. The gang members involved ended up kidnapping Luke and when he was discovered alive in 2011, Isaac was forced to frame him for drug addiction so that he would not discover the truth. Bella Cooper (Ameila Reid) started to piece together the puzzle and Isaac got engaged to her to put her off the scent. They broke up however and Isaac finally got hold of his money but Luke returned knowing the truth and after attempting to murder his uncle, Isaac ended up fleeing the country without Brooke as he hoped. He was last seen in March stranded in the Philippines after his trust fund was again locked.