Main cast • François Chénier: Carl "Le Cat" Charest (student radio music director) •
Robin Aubert: Léo Rivard (technical director) • Rachel Fontaine: Maria Lopez (finance director) • Anne-Claude Chénier: Camille Bergeron (content director) • Michel Charette: Jean-Lou "Le Hot-Dog" Duval (radio staffer) • Vincent Magnat: Germain St-Germain (radio staffer) •
Guillaume Lemay-Thivierge: Jean-David Vézina (radio staffer) • Joël Marin: Vincent Gélinas (editor in chief of the school newspaper and staffer at the radio station) (season 3) • Isabelle Drainville: Dominique Vachon (newspaper staffer) •
Micheline Bernard: Jocelyne Letendre (school psychologist, also in charge of the school's extracurricular activities) (season 2) • Pierre Claveau: Rodolphe Giroux (principal) •
Alexis Martin: Firmin Laplante (head of mathematics department) • Bruno Blanchet: Gontrand Galgouri (head of science department)
Supporting cast • Serge Thériault: André Dufresne (head of history department) • Luc Bourgeois: Hervé Duguay (head of history department) • Sylvie Potvin: Madame Champoux (school cook) • Jean-Nicolas Verreault: Fred (student) • Sylvie Choquette: Élisabeth Trave (student and bassist in a band with Carl, Mr. Giroux and Jean-Lou) • : Carole Péloquin (inspector for the Ministry of Education) • Louis-Georges Girard: Monsieur Charest (Carl's father and owner of the bowling alley) • Sophie Faucher: Lucienne Pitzikini (Owner of the boutique
Chic Madame) • Richard Lalancette: Gilbert (Jocelyne's husband) • Jean-François Baril: Carol Giroux (Mr. Giroux's nephew) ==Broadcast history==