When Jim reads the newspaper article from Brianne Lambert, the article mostly has gibberish that repeats several times, but it mentions him taking over the load of his good friend Gandolf Fitch. The friend who he's taking the caseload from is actually Booker Hutch. Gandolf Fitch was a recurring character in the series played by Isaac Hayes. Later, when he reads the article to Dennis, he says Mr. Hutch instead of Gandolf Fitch.
This movie marks the first appearance of Gretchen Corbett (as Beth Davenport) since the Season 4 episode, "The Attractive Nusiance."
When the Firebird is delivered by Gus at the start of the film, it is missing all four tyres. When the Emmenthaler's arrive the Firebird was acquired both rear wheels.