Colin Fox (Jean Paul Desmond/Jacques Eloi Des Monde) and Cosette Lee (Raxl) are the only two actors that appear in the first and last episode of the series.
With 195 episodes, the show could be broken into three parts. Each part would consist of 65 episodes. Unofficially, the titles include: Part 1: The Curse of Maljardin (episodes 1 - 65), Part 2: The Curse of the Red Star (episodes 66 - 130, Part 3: The Curse of the Desmond's (episodes 131 - 195).
The show is notorious for not showing the actors names in the ending credits. When the actors were credited, it would be for the main characters. Therefore, most guest star actors were never credited for appearing on the show. For example, the actress who played Annie Hannigan is not captured under Cast and Crew section.