This episode was filmed during a time when a contagious flu plagued the cast and crew. Most of the time, production was often stopped due to people getting sick.
The only episode not to feature the character of Little Pete.
When bus driver Stu gets lost on a school field trip, a fantasy sequence shows road signs flashing before his eyes. First is a highway sign that says "JCT 23895". The second sign is written (mostly) in Greek, and if the final Roman-looking "S" is replaced with it's Greek equivalent (Sigma), says "EISAI CHAMENOS" - "You are lost". The final sign is in Korean, and appears to say, "jyeo ma l", or "Do Not Go". (There is an interesting claim on the DVD commentary, that the meaning of the Greek sign is, "All the world's a stage". The speaker on the DVD seems to think that's really what the sign means, but it clearly does not. The only comment on the DVD about the final sign is that it is Korean, with no reference to the meaning.)
When the two detectives pull Stu over, thinking he is a kidnapper, the show's creators, speaking on the DVD commentary, say they are "actually the auditors from Nickelodeon". (The other commentators on the DVD laugh at that comment, so it may or may not be true.)