up meeting Bo. She has a close friendship with Mr. Howie and is a Molly Hardy supporter, unaware of Molly true intentions. Colin Fox as Mr. Arthur Howie: Shirley's history teacher at Sussex. He used to attend Sussex and boarded at the dorm, and was also a very popular student, as shown in "The Case of the Dead Debutante". However, he has kinder-phobia, the phobia of children, as revealed in "The Case of the Alien Abductions". Maggie Huculak as Dr. Joanna Holmes: Shirley's mother, who had disappeared for several years as a result of being in Rwanda during a civil war. She, Shirley, and Robert are reunited when Mr. Holmes is offered the chance to go to Rwanda on business. It is often said that Shirley shares her curiosity and determination to never give up. Supporting/Recurring Characters R. Morgan Slade as Parker. Shirley's classmate who often hangs out with Shirley's gang. However he is barely involved in a case. Nathan as Watson the Dog. Shirley's dog. Helen Roupp as Mrs. Fish. Lazy secretary of Sussex Academy. She is the opposite to Ms. Stratmann. Michael Puttonen as Detective Tremain. He is always wrong about his suspicions, and is Shirley the one who solves the case instead of him. Phillip Jarrett as Inspector Marquee. He is often after Bo' footsteps. Jay Brazeau as Frank Patterson. Stink's father. Arne MacPherson as Adam QuincyRick Howland as Bernie Szabo in "The Case of the Bouncing Baby" Awaovieyi Agie Father Pierre Cayobanda. Thomas Milburn Jr. as Kasey Zee. Reporter. Jonas Chernick as Daniel Devine. An artist that blamed Stink's dog as a cat killer. He also appeared as Mikola in The Case of the Desperate Dancer. Dave 'Squatch' Ward as Jarrod. A motorcyclist that helped Ms. Stratmann in The Case Of The Bamboozling Blonde, he also appeared in The Case of the Liberated Beasts. Kett Turton as Norman Melter, he replaced Stink. Somewhat eccentric guy. Leslie Wolos as Heather, student in Sussex Academy, she starts dating Bo in last episode. She also appeared in other episodes as a different character. Jennifer Lin as Bai Sung. She hides a secret about herself and suddenly turns into Bo's love interest that makes Shirley's more jealous than intrigued. Bill Switzer as Matt. Shirley's love interest. At first they don't get along well, because Matt mistook Shirley and Bo as a couple, then both realized that they have lot in