Continuity mistake: Series 1, Episode 9: Primal. As Carter and Taggart are crawling through the access tunnel, the torch attached to the side of Taggart's goggles is pointing downwards, below his line of vision as established by the lenses on the front. As the shot changes to a close-up on Taggart, the torch is now pointing forwards, aligned with the lenses.
Continuity mistake: When Andy pushes Jack out of the way when the F.T.L. is malfunctioning he is pushed into 2 stacks of crates, they are seen all falling away from him. The next shot of him he is just falling against the crates and one of them falls on him instead of away from him and the other stack stays where it is.
Continuity mistake: At the beginning of the scene where Dr. Grant gives Jack the crank for the satellite dish, Henry turns his hat around so it is backwards, later on in the scene it is now facing forward, then is backward again, then at the end of the scene he is seen facing it forward.
Continuity mistake: Sheriff Carter has only one Jeep Cherokee for his staff. It constantly changes from a 1989 to a 1990 model throughout the series. This can be caught easily by looking at the triangular window near the hinge on the front doors. Jeep removed the tilting hinges on the window after the 1989 year was discontinued. This happens throughout season one and two.
Continuity mistake: At the end of the previous episode, when Carter tells Grant not to plan the wedding just yet, Carter leaves Cafe Diem and Grant says "May the best man win," as an aside. In this episode, the replay shows Grant saying this while Carter is still in the cafe, just in front of him.