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 (2004)
Dr. Craig Valentine was the old school friend of Chris Warner (Michael Galvin). He quickly became the head of ED at the hospital and clashed with many due to his fiery and at times, moody, personality. He was portrayed Renato Bartolomei until 2008.