Martin Dunkly, Irma Dawes, Tiffany and Mr. Short are the only characters shown to exist in all five of the series' main worlds: Ben's World, Katherine's World, Hippie World, Techno World and Forest World.
Josh Marshall-Clarke (Ben Johnson) and Gillian Alexy (Katherine Raddic) are the only actors to appear in all 26 episodes of the series. In second place is David Richardson (Francis Short), who appeared in every episode except for Martinmania (2004).
David Richardson (Francis) and Rebecca McCarthy (Una) played love interests again in Streetsmartz (2005), which was also created by Paul D. Barron.
Kazimir Sas (Martin Dunkly) previously worked with Gillian Alexy (Katherine Raddic), Igor Sas (Stefan Raddic) and Nicole Bartlett (Mrs Dunkly) in The Gift (1997).
Igor Sas (Stefan Raddic) is the father of Kazimir Sas (Martin Dunkly) and Francoise Sas (Melinda Bruce).