A number of fan conventions were organized by "Due South" fans during the 1990s, the biggest and best-known of which was "RCW 139", so named after the license plate number that recurred throughout the series. RCW 139 was held annually in Toronto between 1996 and 1999, attracting approximately 300 fans from more than 10 countries in both 1998 and 1999. The convention featured games, discussion panels, a formal dinner, and guest panels. Numerous cast and crew members have attended, including David Marciano (1998), Paul Gross (1999), Gordon Pinsent (1998), Tom Melissis (1997, 1998, 1999), Tony Craig (1997), Catherine Bruhier (1998, 1999) and Jay Semko (1998, 1999). Draco (Diefenbaker) and his trainer, Gail Parker, were guests in both 1998 and 1999.