text: Martin's father, and Diana's stepfather. The complete opposite of his son, Gerard is a very rational, logical person. As a scientist, he spends much of his time doing field work in the forest. He and Martin have a strained relationship, partly due to Gerard considering Martin's interest in the paranormal to be "balderdash". He only appeared in two episodes; in his second appearance, he finds out about "The Center" and that Diana and Martin work for it. Diana's mother, who happens to be Martin's stepmother, is only mentioned once in season three.
  Broadcast
  Martin Mystery aired in Canada on YTV and Discovery Kids in English, and on Vrak in French, from 2003 until the series finale in 2006.
  In the United States, the first 7 episodes were originally shown on FoxBox in May and June 2004. Nickelodeon later picked up the series, and after a brief run on the main channel, the series aired on Nicktoons Network from 4 July 2005 until 27 April 2008.
  In other markets
  Other channels that aired the show included M6 in France, Rai 2 in Italy, and Jetix throughout Europe (excluding Italy and Poland). Additional channels in Europe included SVT1 and SVT Barnkanalen in Sweden, NRK Super in Norway, Yle TV2 in Finland, GMA Network and Q (now known as GTV) in the Philippines, VT4 in Belgium and ZigZap in Poland. In Sri Lanka, the series was aired by Channel Eye of the Sri Lanka Rupavahini Corporation.
  MBC 3, Ajyal TV, and ART 3 broadcast this show in Arabic throughout the Middle East, with the voice talents of Mo'awad Ismail as Martin and Mariam El Khesht as Diana.