Character mistake: When the artifacts from the late 19th century, found in a cave, are identified by the away team, Data identifies the pistol as a "double action" Colt 45, circa 1873. The pistol is a Colt single action army, caliber .45. Certainly not a "double action".
Star Trek: The Next Generation (1987)
2 character mistakes in season 5
Encounter at Farpoint (1) - S1-E1
Other mistake: When Q the Judge enters on his throne, at one point, the hydraulic arm the throne is on is visible, despite being black to blend in. Conversely, in "All Good Things...", the final episode, the arm is missing having been matted out by CGI techniques. (00:21:45)
More trivia for Star Trek: The Next Generation
Question: Near the end when they are in the holodeck for the memorial ceremony for Lt. Yar, Dr. Crusher's uniform is green and seconds later it is blue. After watching it several times, it does not appear to be a trick of the light. What happened here? Why would she have on a green uniform in the first place?
Chosen answer: The uniform does indeed change colour. It may be due to the need for a green screen in part, or perhaps some lighting altering our perception. That being said, it certainly looks green at the start, blue thereafter.
The show has been done in HD now and not sure if they fix this problem.
Dan23