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 (1998)
Dr. Mackenzie Choat was the villainous psychiatrist who first appeared in mid-1998. Mackenzie began to date Lionel Skeggins (John Leigh) but when she discovered Oscar (Christopher Brown) had raped Minnie (Katrina Devine), Oscar framed her for fraud and Mackenzie lost her job. Oscar was found bludgeoned and an increasingly unhinged Mackenzie married Lionel before he realised she was the culprit and fled. Lionel went missing and was suspected dead, leading Mackenzie to desperately sleep with Frank Malone (Christopher Hobbs) and drug Lionel's son Luke (Greg Freeman) so he would stay with her. Caroline Buxton (Tandi Wright) realised Mackenzie was Oscar's attacker and brought the comatoze Oscar to the hospital to scare her. Mackenzie discovered the coma was fake and attacked Oscar, before exploding his hospital room and fleeing with the money he had stolen from the hospital. However, as she fled, Greg Feeney (Tim Balme) sneakily took the money, leaving her with nothing.