voyage features many of scud’s colleagues from previous films, such as the actors byron pang, haze leung, adrian "ron" heung, and linda so, as well as several technical staff, such as the director of photography, charlie lam, who worked on scud’s 2010 film "amphetamine". during filming, scud said, "i am really enjoying shooting in europe because people are so film-friendly.. i can see myself coming back to film again in europe". the german episode includes appearances by the uk actress debra baker (junkhearts) and the german actress leni speidel, who was also the production manager for filming in europe.