Hippie drug guru Timothy Leary's expertise in botany and pharmacology as Dr. Milo in "Stagecoach"...not to mention his Fauxlosophical Hand Contemplation scene.
John "Gomez Addams" Astin mentioning how the [John & John Q.] Adams family was "weird".
The series finale features a group of villains who are all played by football players, and discuss their plan to capture Brisco in the same style as a football play, including shouting "Break!" at the end. While running down a street, they encounter props which conveniently resemble a football training camp obstacle course, including tires.
The traveling scenes are denoted by a very Indiana Jones -style red line on a map overlaid with video footage, which falls more within Author Allusion.
Friday Night Death Slot: Creator Carlton Cuse blames this for the show's failure. However, it should be noted that it was paired with another new show called The X-Files.
Reality Subtext: Originally, the writers envisioned the rivalry between Brisco and Bowler lasting longer. However, as Bruce Campbell and Julius Carry had such strong chemistry, the writers were compelled to have them interact more often - leading to Brisco and Bowler becoming close friends sooner than expected.